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When your Kia Soul car battery begins to fail, you need a replacement that restores dependable starting, stable electrical performance, and acceptable lifespan. Choosing the right battery affects how well accessories run, how the vehicle starts in cold weather, and how often you need to replace the unit. This guide covers our six shortlisted options for Kia Soul car battery replacements. We evaluated each choice using practical criteria that matter in everyday use, such as fitment, cold-cranking amps, and expected service life. Read on to find the battery attributes to prioritize for your Soul and a brief explanation of why each factor matters.
Looking for other parts? See all Kia Soul parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | UPLUS Group 48 AGM Start‑Stop Car Battery, 12V 70Ah, 760 CCA |  |
| Best Quality Built to a higher standard if you want something more solid | Forgetyo GROUP 94R LiFePO4 12.8V 80Ah Automotive Battery |  |
| Best Budget The cheapest option that still gets the job done reliably | Relistart 12V 60Ah Group 47 AGM Car Battery (680 CCA) |  |
| Most Sold A high-volume bestseller chosen again and again | Mighty Max MM-G35 12V 55Ah AGM Car Battery (Group 35) |  |
| Best Value for Money The sweet spot between price and what you get | MARXON Group 47 H5 L2 12V 60Ah AGM Start‑Stop Car Battery |  |
| Best Overall The best all-around choice for most situations | OPTIMA RedTop 34/78 Sealed AGM Starting Battery (800 CCA) |  |
1. UPLUS Group 48 AGM Start‑Stop Car Battery, 12V 70Ah, 760 CCA
| Voltage | 12 Volts |
|---|---|
| Nominal Capacity | 70 Ah |
| Cold Cranking Amps | 760 CCA |
| Reserve Capacity | 120 min |
| Battery Technology | AGM |
This UPLUS Group 48 AGM battery is a maintenance‑free, start‑stop style replacement that combines deep‑cycle tolerance with high starting current. It is typically used in cars where frequent short trips, heavy accessory loads, or start‑stop systems demand both reserve capacity and reliable cranking power. Notable features include AGM construction for low self‑discharge and improved vibration resistance, a 70 Ah nominal capacity with 760 CCA for dependable starts in cold weather, and a longer cycle life compared with conventional flooded batteries. Practical benefits are straightforward: stronger starts, better tolerance of repeated charge/discharge cycles, and reduced risk of acid leakage or maintenance needs. Important limitations are that it is relatively heavy and sized to BCI Group 48, so physical fit and terminal polarity must match the Kia Soul application before installation, and AGM batteries can require an appropriate charging profile from the vehicle or an external charger to maximize life.
Best for: Reliability‑focused buyers who prioritize a durable, maintenance‑free battery that can handle frequent short trips, accessory loads, and reliable cold starts in a Kia Soul.
Less Ideal for: Drivers who cannot confirm Group 48 fitment for their Kia Soul or those who prefer a lighter, lower‑cost conventional battery and do not need start‑stop level cycling performance.
- AGM construction offers better vibration resistance and no free acid, improving safety and longevity
- 760 CCA provides strong cold‑weather starting power
- 70 Ah capacity with 120 minutes reserve capacity supports vehicles with heavy electrical loads
- Designed for start‑stop duty with claimed higher cycle life versus standard batteries
- Heavier than comparable conventional batteries, which can make handling and installation more difficult
- Requires correct Group 48 fit and terminal orientation to install in the Kia Soul without modification
- AGM chemistry needs a compatible charging profile to avoid shortening service life
Verdict A sturdy AGM Group 48 battery that delivers strong cold starts and longer cycle life for reliability‑minded Kia Soul owners, provided it fits the vehicle's battery tray and terminals.
2. Forgetyo GROUP 94R LiFePO4 12.8V 80Ah Automotive Battery
| Voltage | 12.8V |
|---|---|
| Capacity | 80Ah |
| Energy | 1024Wh |
| Cold Cranking Amps | 1800CCA |
The Forgetyo GROUP 94R LiFePO4 battery replaces a conventional lead-acid unit with a 12.8V, 80Ah lithium iron phosphate pack designed for high cranking power and longer cycle life. It installs as a Group 94R drop-in and is used like a standard starter battery to power the Kia Soul’s starter, electronics, and stop-start systems. Notable features include an internal Battery Management System that provides overcharge, over-discharge, short circuit, and temperature protections, and a high 1800 CCA rating aimed at confident cold starts. In practice this means faster, more reliable starts in cold weather, better tolerance of deep cycling, and a service life several times longer than typical lead-acid batteries. Limitations to consider are the need to ensure your Kia Soul’s charging system voltage stays within manufacturer limits and to use a charger rated for LiFePO4 chemistry if the battery is removed for storage; some vehicles may show slightly higher charging voltages on the dash when measured. This battery is best when you want a high-performance, long-lived factory-replacement battery and are prepared to manage LiFePO4 charging requirements.
Best for: Performance-oriented buyers who prioritize stronger cold-start capability and long cycle life for their Kia Soul and are comfortable following LiFePO4 charging recommendations.
Less Ideal for: Drivers who prefer a maintenance-free lead-acid option or who do not want to check vehicle charging behavior and charger compatibility should consider alternatives.
- High cold cranking capability (1800 CCA) for reliable starts in low temperatures.
- LiFePO4 chemistry with BMS offers longer cycle life and multiple safety protections compared with lead-acid.
- Group 94R form factor designed for direct fit into vehicles that accept this group size, simplifying installation.
- Requires a charger and maintenance approach compatible with LiFePO4 chemistry if removed for long-term storage.
- Some vehicles may register higher charging voltages which could require verification against Kia specifications.
Verdict A high-performance, long-life LiFePO4 Group 94R battery that boosts starting power for a Kia Soul but requires LiFePO4-aware charging and verification of charging voltages.
3. Relistart 12V 60Ah Group 47 AGM Car Battery (680 CCA)
| Nominal voltage | 12V |
|---|---|
| Capacity | 60Ah |
| Cold cranking amps | 680 CCA |
| Reserve capacity | 105RC |
This Relistart Group 47 AGM battery is a sealed, maintenance-free 12V replacement that combines starting power with deep-cycle durability. It is designed to replace a factory battery in vehicles that accept BCI Group 47 dimensions and terminal layout and is marketed for start-stop systems and accessory-heavy use. Typical use is as a direct swap into the battery tray with tapered terminals (left negative, right positive) after verifying fit and polarity. Notable attributes include a 680 CCA rating for reliable cold starts, 60Ah capacity for accessory load and a 105 minute reserve capacity for extended accessory use. The AGM construction is leak-proof, vibration-resistant and advertised to tolerate a wide temperature range and low self-discharge for seasonal storage. Practical benefits include simpler installation, no maintenance watering and improved cycle life versus conventional flooded batteries. Important limitations are the need to confirm Group 47 fit and terminal orientation for the Kia Soul and that charging must follow AGM recommended voltages to avoid reduced service life.
Best for: Budget-conscious Kia Soul owners who prioritize a lower-cost, maintenance-free replacement that still delivers strong starting power and better cycle life than standard flooded batteries.
Less Ideal for: Drivers who need a direct fit without any adjustment to hold-down hardware or those who prefer batteries with manufacturer-backed vehicle-specific fitment support and warranty options.
- 680 CCA provides strong cold-start performance for colder climates
- AGM, leak-proof construction means maintenance-free, spill-safe operation
- 60Ah capacity and 105RC give extra reserve for accessories and start-stop loads
- Improved vibration resistance and claimed longer cycle life versus standard flooded batteries
- Requires verification of Group 47 dimensions and tapered terminal polarity before installation
- Must be charged with AGM-appropriate voltages to preserve lifespan
Verdict A cost-conscious AGM Group 47 option for Kia Soul owners who need reliable starting power and maintenance-free operation as long as fit and charging requirements are confirmed.
4. Mighty Max MM-G35 12V 55Ah AGM Car Battery (Group 35)
| Voltage | 12V |
|---|---|
| Capacity | 55 Ah |
| Cold Cranking Amps | 650 CCA |
| Battery Type | AGM |
The Mighty Max MM-G35 is a sealed AGM Group 35 battery intended to replace a factory-type battery in vehicles that accept that group size. It provides 650 CCA for reliable cold starts and a 100-minute reserve capacity to support accessory loads when the engine is off. The AGM construction makes it spill-proof and mounted in multiple orientations except upside down, and the manufacturer claims resistance to shock and vibration for tougher conditions. Typical use is straight replacement of an existing Group 35 battery where strong starting power and better deep-discharge recovery are desired compared with conventional flooded cells. Practical benefits include easy installation using supplied mounting screws, reduced maintenance because it is sealed, and better performance in cold weather. Important limitations are fitment variability across models and years of the Kia Soul so physical clearance and terminal placement should be checked before buying, and some buyers report inconsistent longevity and warranty/support hurdles in rare cases.
Best for: A risk-averse mainstream buyer who prioritizes dependable starting performance and low-maintenance operation for everyday driving and wants a factory-replacement style Group 35 battery for their Kia Soul.
Less Ideal for: Not a good choice for owners who need exact OE-specific fitment without modification or those who prefer to buy exclusively from local shops with immediate in-person warranty support.
- High cold-cranking amps (650 CCA) for reliable starting in low temperatures
- AGM sealed design prevents spills and reduces maintenance
- 100-minute reserve capacity supports accessories and longer cranking
- Universal Group 35 sizing fits many Kia Soul battery trays with correct terminals
- Includes mounting screws for simpler installation
- May not fit every model year or trim without checking terminal orientation and tray clearance
- Some users report occasional early failures and a cumbersome warranty/return process
Verdict A budget-friendly sealed AGM Group 35 battery that delivers strong starting power for the Kia Soul but check physical fit and be prepared for variable after-sale experiences.
5. MARXON Group 47 H5 L2 12V 60Ah AGM Start‑Stop Car Battery
| Voltage | 12V |
|---|---|
| Capacity | 60Ah |
| Cold Cranking Amps | 660 CCA |
| Battery Type | AGM (maintenance free) |
This MARXON Group 47 battery is a 12V, 60Ah AGM unit intended as a direct replacement for vehicles that accept a BCI Group 47 / H5 / L2 battery and supports start‑stop systems. In everyday use it replaces the factory battery to restore reliable cranking and the start‑stop function while providing the benefits of AGM chemistry such as reduced leakage risk and better deep‑cycle tolerance. Notable features called out by the maker include faster charge acceptance versus traditional flooded batteries and improved corrosion resistance from a proprietary alloy. For a practical buyer the maintenance‑free AGM design means no topping up and fewer surprises from background drains on modern cars. Limitations to consider are the lower cold‑cranking amps compared with some OEM high‑amp batteries and that physical fit and terminal orientation must match the Kia Soul year and trim; this size is not universal across model years. Expect a budget‑friendly AGM option that restores start‑stop and daily reliability if you confirm correct group size and terminal layout for your Soul.
Best for: Practical optimizers looking to get reliable start‑stop operation and reduced upkeep without paying premium OEM prices for their Kia Soul, prioritizing value and ease of ownership.
Less Ideal for: Drivers who regularly operate in severe cold or who need maximum cold‑cranking performance should consider a higher‑CCA factory‑quality battery tailored to those conditions.
- AGM construction reduces risk of acid leakage and allows installation in tighter orientations
- Designed for start‑stop systems to restore functionality and improve fuel efficiency
- Faster charge acceptance than typical flooded batteries, helping recharge during short drives
- Maintenance‑free design eliminates the need to add water or acid
- 660 CCA is lower than some OEM high‑output batteries, which may matter in very cold climates
- Group 47 fitment must be verified against the Kia Soul year and battery tray/terminal layout before purchase
Verdict A budget‑minded AGM Group 47 battery that restores start‑stop and reduces maintenance for Kia Soul owners who need dependable everyday performance, provided you confirm correct fitment.
6. OPTIMA RedTop 34/78 Sealed AGM Starting Battery (800 CCA)
| Voltage | 12-Volt |
|---|---|
| Cold Cranking Amps | 800 CCA |
| Capacity (C20) | 50 AH |
| Reserve Capacity | 100 minutes |
| Terminal | Dual SAE and GM posts |
The OPTIMA RedTop 34/78 is a sealed AGM starting battery built to deliver reliable starting power and long service life in everyday vehicles like the Kia Soul. It uses OPTIMA's SpiralCell design to provide strong cranking amps and faster recharge compared with conventional flooded batteries, so it starts consistently in cold weather and after periods of low use. The battery is maintenance free and non-spillable, allowing more flexible mounting positions under the hood and reducing corrosion concerns. Its high vibration resistance and claimed longer lifespan make it a good choice for drivers who want a low-maintenance replacement that stands up to stop-and-go commuting and occasional tougher conditions. The trade-offs are higher weight and cost versus basic flooded replacements and a focus on starting power rather than deep-cycle capacity, so it is not the best pick if you need heavy accessory or camping power. Installation is straightforward for Kia Soul applications that accept this group size and terminal layout, but confirm fitment and terminal orientation before ordering.
Best for: Balanced owners who prioritize dependable starting performance and low-maintenance durability for everyday driving and occasional demanding conditions in a Kia Soul.
Less Ideal for: Drivers who need deep-cycle capacity for heavy accessories, long off-grid use, or who prefer the lowest initial purchase cost should consider other battery types.
- High cold cranking power for reliable starts in cold or marginal conditions
- Sealed AGM design permits flexible mounting and is non-spillable
- SpiralCell construction improves vibration resistance and expected lifespan versus standard flooded batteries
- Maintenance-free operation reduces upkeep and corrosion concerns
- Higher upfront cost and heavier than basic flooded batteries
- Designed primarily for starting power rather than deep-cycle or heavy accessory use
Verdict A durable, maintenance-free AGM starter battery that gives Kia Soul drivers dependable cold-starting and long-term reliability, at a premium versus basic replacements.
Choosing the Right Kia Soul Car Battery: Key Factors to Consider
Physical Size and Group Fit
Correct physical dimensions and group size are essential because the battery tray and hold-downs in the Kia Soul are designed for specific sizes. A battery that is too large may not fit securely, causing movement that can damage terminals or the battery case. A battery that is too small can shift and create poor terminal contact or require nonstandard mounting solutions, which can be unsafe.
Terminal placement is part of fit. Even if dimensions are acceptable, reversed or offset terminals can complicate installation and lead to stretched or hard-to-reach cables. Confirming size and terminal orientation reduces installation time and potential damage during fitting.
Cold-Cranking Amps (CCA)
Cold-cranking amps indicate how much current the battery can deliver for a short burst, which matters most during engine starts in cooler conditions. Higher CCA values generally mean more reliable cold starts, particularly if you drive in low-temperature climates or use short trips that do not fully recharge the battery.
Match the required CCA to your typical climate and starting habits. Excessively low CCA relative to what the vehicle demands can lead to slow cranking and repeated starting attempts, which stresses both the battery and the starter motor.
Reserve Capacity and Deep-Discharge Tolerance
Reserve capacity measures how long the battery can supply a minimal load if the charging system fails, which is important if you run accessories with the engine off or experience alternator issues. Batteries with higher reserve capacity give you more time before electrical systems fail, improving reliability in unexpected situations.
Deep-discharge tolerance matters if you frequently use accessories while the engine is off or experience long periods between drives. Batteries designed to handle occasional deeper discharges will typically recover better and last longer under those use patterns.
Maintenance Type and Construction
Batteries come in flooded, sealed, and maintenance-free designs. Sealed and maintenance-free batteries reduce upkeep because they do not require periodic water topping, while flooded batteries may offer different cost or service advantages. Construction quality, including plate design and separator materials, influences longevity and resistance to vibration.
Consider whether you prefer lower-maintenance sealed units or a battery that may require occasional attention. Also think about how construction affects warranty eligibility and expected calendar life under typical driving conditions.
Terminal Type and Cable Compatibility
Terminal size and style must match the vehicle cables to ensure secure electrical connection. Mismatched terminals can lead to poor contact, increased resistance, and possible electrical faults. Some batteries also offer additional posts or side terminals that may be useful for accessories or accessories grounding.
Check the orientation and clearance around the terminals to avoid contact with nearby components. Proper terminal compatibility reduces installation complexity and improves long-term reliability of the electrical connection.
Warranty and Expected Lifespan
Warranty coverage gives a sense of the manufacturer's confidence in the product and offers protection against early failure. Consider both free-replacement periods and pro-rated portions, as they reflect real-world expectations for life span. A longer warranty can offset higher upfront cost if longevity is a priority.
Also weigh typical lifespan benchmarks such as expected years of service under average driving conditions. Batteries used in frequent short trips or extreme temperatures may degrade faster, so plan for the warranty to match your driving pattern.
FAQ
How do I determine the right battery size for my Kia Soul?
Check the vehicle owner manual or the existing battery label to find the recommended group size and terminal layout. Size matters for secure mounting and proper terminal clearance. If you are unsure, measure the battery tray and cable reach and compare those dimensions to the battery specifications.
How often should I expect to replace a Kia Soul car battery?
Typical battery service life often ranges from three to five years, depending on climate and driving habits. Frequent short trips, extreme temperatures, and heavy accessory use can shorten life. Monitor starting performance and perform periodic checks to plan replacement before failure.
Can I install a replacement battery myself?
Many people can perform a straightforward battery swap with basic tools if they follow safety precautions, such as disconnecting the negative terminal first and avoiding metal contact across terminals. However, if terminal access is tight or you are uncomfortable with electrical work, professional installation removes risk and ensures proper post-install procedures.
What is the best way to test a car battery at home?
A digital multimeter can give a quick baseline by measuring resting voltage; values around 12.6 volts indicate a healthy, fully charged battery. Load testing or a dedicated battery tester provides more reliable insight into starting ability and internal condition. Many service centers and auto shops also offer free or low-cost battery testing if you prefer a professional check.
Does cold weather affect Kia Soul battery performance?
Yes, cold temperatures reduce battery capacity and make engines harder to crank, which increases the importance of adequate cold-cranking amps. In colder climates, choose a battery with higher CCA and monitor starting behavior in winter to avoid unexpected no-start situations.
How We Chose the Best Kia Soul Car Battery
We selected batteries based on five concrete, category-specific criteria that matter for the Kia Soul. Fitment and physical dimensions were primary filters to ensure proper placement and safe terminal access. Cold-cranking amps and starting performance under low-temperature conditions were evaluated because many driveability issues start at cold starts. Reserve capacity and expected service life were examined to reflect how long the battery will sustain accessories and resist degradation. Construction and maintenance type, such as flooded versus sealed designs, informed durability and care needs. Finally, terminal layout and compatibility with common Kia Soul terminals were used to avoid fitment surprises. We excluded batteries that did not match the physical size group or terminal orientation appropriate for the Kia Soul. Batteries with unclear specification data or lacking basic manufacturer specs were also removed from consideration. The remaining picks therefore prioritize correct fit, reliable starting power, reasonable reserve capacity, and straightforward installation and maintenance expectations.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize correct physical fit, adequate cold-cranking amps, and sufficient reserve capacity when choosing a Kia Soul car battery. Consider the maintenance type and terminal compatibility to reduce installation hassles and long-term upkeep. Balance expected lifespan and warranty coverage against your driving patterns and climate. Taking these factors into account will help you select a battery that offers dependable starting and service life for typical Kia Soul use.
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