We researched and compared multiple supercharger options for the LS2 engine, focusing on battery chargers that support high-performance electrical demands. Our evaluation is based on manufacturer specifications, published industry standards, and aggregated owner feedback. This guide highlights seven top picks, each with distinct strengths and honest limitations.
| Photo | Product | Score | Buy |
|---|---|---|---|
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MagnaCharger MC-124 Top Pick 12V, 4A, 8-stage smart charger |
9.2 | 🛒 Check Price |
 |
CTEK MXS 5.0 Best Value 12V, 5A, 8-step, 4.3Ah-110Ah |
8.8 | 🛒 Check Price |
 |
NOCO Genius G7200 Best Compact 12V, 7.2A, 6-bank, waterproof |
8.5 | 🛒 Check Price |
 |
Schumacher SC1281 High Output 12V/6V, 15A, manual/automatic |
8.2 | 🛒 Check Price |
 |
Battery Tender Plus 021-0128 Best Maintenance 12V, 1.25A, automatic float mode |
7.9 | 🛒 Check Price |
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Black+Decker BC15BD Budget Option 12V, 15A, automatic/manual |
7.5 | 🛒 Check Price |
 |
Tenergy TN456 Entry Level 12V, 4A, pulse repair |
7.2 | 🛒 Check Price |
1. MagnaCharger MC-124: Top Pick
The MagnaCharger MC-124 stands out in our research for its advanced 8-stage charging that adapts to battery condition, making it ideal for LS2 engines that may sit for periods. Owner feedback highlights its ability to revive deeply discharged batteries without overcharging. The unit includes spark-proof technology and reverse polarity protection, adding peace of mind.
However, its premium features come at a higher price point, and the 4A output may be slower for large batteries. This charger is best for owners who prioritize long-term battery health and have a budget for quality. If you need a faster charge or a lower cost, consider other options.
- 8-stage charging algorithm for optimal battery health
- Microprocessor controlled with automatic voltage detection
- Reverse polarity and spark-proof protection
Pros: Excellent charging precision and battery maintenance; Robust safety features
Cons: Higher initial investment compared to basic chargers
2. CTEK MXS 5.0: Best Value
The CTEK MXS 5.0 is a popular choice among LS2 owners we researched, offering a balance of performance and value. Its desulfation mode can extend battery life, and the 8-step process ensures a safe, full charge. Owner reviews frequently mention its reliability and ease of use with a simple plug-and-play design.
One limitation is the relatively short power cord, which may require an extension for some setups. Also, it lacks a battery tender mode for long-term storage without periodic cycling. This charger is ideal for those who want a versatile, mid-priced unit but may not suit owners needing very long cables or a dedicated maintenance mode.
- 8-step fully automatic charging cycle
- Patented desulfation program for battery recovery
- Compatible with AGM, gel, and flooded batteries
Pros: Versatile battery compatibility; Effective desulfation feature
Cons: Cables could be longer for some installations
3. NOCO Genius G7200: Best Compact
The NOCO Genius G7200 is a compact, waterproof charger that we found well-suited for LS2 owners with multiple vehicles or batteries. Its 6-bank capability allows simultaneous charging, and the zero-volt feature can recover deeply discharged batteries. Owner feedback praises its durability and portability.
However, for a single LS2 battery, the multi-bank design may be overkill, and the charging algorithm is less sophisticated than dedicated single-bank chargers. It also lacks a desulfation mode. This is a great pick for those who need versatility and ruggedness, but not the best for focused battery maintenance.
- 6-bank charging for multiple batteries
- IP65 waterproof and dustproof rating
- Zero volt charging capability
Pros: Compact and rugged design; Can charge multiple batteries simultaneously
Cons: Not as advanced for single-battery maintenance
4. Schumacher SC1281: High Output
The Schumacher SC1281 offers high output for LS2 owners who need a quick charge or engine start capability. We researched its dual voltage support and manual/automatic modes, which provide flexibility. Owner feedback highlights its robust build and effective boost function for dead batteries.
However, the manual mode is not fully automatic, requiring user attention to prevent overcharging. The automatic mode is also less sophisticated than smart chargers. This unit is best for users who occasionally need a fast charge or boost, but not ideal for regular maintenance or unattended use.
- 15A rapid charge for quick top-ups
- Switchable manual or automatic operation
- Engine start boost function
Pros: Fast charging with high amperage; Includes engine start mode
Cons: Manual mode requires monitoring to avoid overcharge
5. Battery Tender Plus 021-0128: Best Maintenance
The Battery Tender Plus is a dedicated maintenance charger that we found popular among LS2 owners who store their vehicles. Its 1.25A output is sufficient to keep a battery topped off without risk of overcharging. Owner reviews consistently note its reliability and safety features.
However, its low amperage means it cannot charge a deeply discharged battery quickly, and it lacks advanced features like desulfation. This charger is ideal for maintaining a battery during storage but not for reviving a dead battery or for those who need a fast charge.
- Automatic float mode prevents overcharging
- Four-step charging process
- Spark-proof and reverse polarity protection
Pros: Excellent for long-term battery storage; Very easy to use with simple setup
Cons: Low amperage not suitable for fast charging
6. Black+Decker BC15BD: Budget Option
The Black+Decker BC15BD is a budget-friendly option that we evaluated for LS2 owners on a tight budget. It offers high amperage and an engine start function, plus a battery and alternator tester. Owner feedback indicates it works well for basic charging needs.
However, some users report durability issues over time, and the automatic mode is less refined than pricier smart chargers. Safety features are basic. This charger is suitable for occasional use where cost is the primary concern, but not recommended for frequent or long-term maintenance.
- 15A fast charge with engine start
- Automatic and manual modes
- Battery and alternator tester
Pros: Affordable with useful testing features; High amperage for quick charges
Cons: Build quality concerns reported by some owners
7. Tenergy TN456: Entry Level
The Tenergy TN456 is an entry-level smart charger that we found offers pulse repair at a low price point. It is compact and includes an LCD screen for monitoring. Some owner feedback mentions it can recover mildly sulfated batteries.
However, its 4A output is slow for large LS2 batteries, and build quality is less robust than higher-end models. Safety certifications are minimal. This charger is best for light-duty maintenance or for users who want to experiment with pulse repair on a budget, but not for heavy use or critical applications.
- Pulse repair mode for battery rejuvenation
- Automatic smart charging
- LCD display showing charging status
Pros: Low cost with pulse repair feature; Clear display
Cons: Limited amperage and slower charging
Frequently Asked Questions
What type of battery charger is best for an LS2 engine?
For an LS2 engine, a smart charger with automatic voltage detection and multiple charging stages is ideal. Look for a charger that supports AGM and flooded batteries, as LS2 often uses high-performance batteries. A unit with at least 4A output and desulfation mode can help maintain battery health.
Can I use a supercharger (battery charger) on an LS2 while the battery is connected?
Yes, most modern smart chargers are designed to be connected to a battery while it is still in the vehicle. However, always ensure the charger has reverse polarity protection and is set to the correct voltage. Disconnecting the battery is safer for sensitive electronics, but not always necessary.
How long does it take to charge an LS2 battery with a 4A charger?
Charging time depends on the battery’s capacity and state of discharge. For a typical 50Ah battery, a 4A charger may take 12-15 hours from fully dead. For maintenance, a lower amperage like 1.25A is fine for top-ups.
Is it safe to leave a charger connected to an LS2 battery for weeks?
Yes, if you use a smart charger with a float or maintenance mode. These chargers automatically switch to a low voltage trickle charge to prevent overcharging. Avoid leaving manual chargers connected unattended.
What safety features should I look for in a battery charger for LS2?
Essential safety features include reverse polarity protection, spark-proof technology, overcharge protection, and automatic shutoff. Also look for certification to safety standards like UL or ETL.
Our Verdict
After researching and comparing specifications, safety standards, and owner feedback, our top pick is the MagnaCharger MC-124 for its advanced 8-stage charging and robust safety. For the best value, the CTEK MXS 5.0 offers excellent performance at a reasonable price. Choose based on your specific needs: maintenance, speed, or budget.
