Product Description
Energizer 125Ah LiFePO4 Battery
The Energizer Industrial Lithium SLIL31-125DCM is a 12V 125Ah lithium deep cycle battery that's engineered for marine, RV, off-grid solar, and energy-storage systems that require high capacity and dependable power. Designed with a 125 amp continuous discharge rating and a built-in Battery Management System (BMS) for protection and long service life. Its light 27 pound design makes it a perfect drop-in lithium upgrade over heavier AGM or flooded Group 31 batteries.
Features & Benefits
- 125Ah Capacity – Long run times for trolling motors, RV house loads and off-grid systems.
- Built-In BMS Protection – Over/under-voltage, over-current, short-circuit and temperature protections.
- Light Weight – Easier handling and drop-in replacement for many Group 31 applications.
- Fast, Efficient Charging – Optimized for LiFePO4 smart chargers and solar charge controllers.
- High Discharge Capability – Supports inverters and DC loads up to 125 continuous amps.
- Scalable System Design – Wire up to 4 in series (24/36/48V) or 4 in parallel (up to 500Ah).
Important: Deep Cycle Use Only – Not suitable for starting applications or golf carts.
Why Choose Energizer Lithium Batteries?
The Energizer Industrial Lithium series batteries are designed with an advanced Battery Management System (BMS) to deliver stable, maintenance-free deep-cycle power—year after year. The standardized group sizes and M8 terminals simplify drop-in lithium upgrades where AGM or flooded batteries were previously used. With fast charging, high discharge capability and support for series & parallel banks, they scale easily from a single house battery to multi-battery energy storage banks. Backed by a 3-Year Warranty and a 4,000 cycle design life for reliable power and excellent long-term value.
| Type | Lithium (LiFePO4) |
| Voltage | 12.8 Volts |
| Capacity | 125Ah / 1600Wh |
| Maximum Continuous Discharge |
125 Amps |
| Group Size | 31 |
| Length | 12.95" (329 mm) |
| Width | 6.77" (172 mm) |
| Height | 8.43" (214 mm) |
| Weight | 27.56 lbs (12.0 kg) |
| Terminals | M8 Inserts (hardware incl.) |
| Polarity | + Left / - Right |
| Charging Current |
10 - 25A |
| Charging Voltage |
14.6V |
| Low Voltage Cut-Off |
8.8V |
| Operating Temperature |
-4°F - 140°F (-20°C - 60°C) |
| Charging Temperature |
32°F - 131°F (0°C - 55°C) |
| Series Connections |
Up to 4 (48V) |
| Parallel Connections |
Up to 4 (500Ah) |
| Cycle Life | 4,000 Cycles |
| Warranty | 3 Years |
VMAX SLIL31-125DCM Group 31 Cross-Reference
Group 31 Lead-Acid Batteries: 31M, 31M-AGM, 31MDP, 31‑PC2150S, 7T31, 7T31P, 8A31DTM, 8G31, 8G31DTM, CT2500, D31M, DC31DT, DP31CS, DP31DT, DURHR12-430C/FR-A, HEPPC2150T-M, NSB‑AGM31, NSB-AGM31M, ODX‑AGM31, ODX-AGM31M, MB137-120, MR137-120, PC2150M, SLI31AGMDP, SLI31AGMDPM, SLI31CS, SLI31DP, SLI31DTMAGMDC, SLI31MDC, SLI31MDP, SLI31PHP/SHP, SLR125, SRM-31, XCA31-1400, XTR12-155, XTR31-135.
Group 31 12V Lithium Batteries: IC-12V100-EP4S, IC-12V125-EP4S, IC-12V150-EP, IC-12V150-EPH, 883-0125-12, BB10012, BB10012H, BB10012i, BB10012iH, LFP12120MBH, PP12-150, RB100, RB100-HP, RB100-LT, SLIL31-125DCM, SLIL31-150DCM-BT.
Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit and performance.
Warning: LiFePO4 charger required if upgrading from non-lithium batteries.
