RELiON RB100HP LiFePO4 Lithium Iron Phosphate 12V Battery, Group 31
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Light on weight, heavy on power—this RELiON RB100HP LiFePO4 lithium iron phosphate (12V) battery is built for dependable marine and land-based use, combining starting capability with deep-cycle performance for house loads.
Key Features
- LiFePO4 lithium iron phosphate chemistry designed for long service life and safe storage
- 100% usable capacity throughout discharge (full power available throughout discharge)
- Dual-purpose performance: supports burst/high current needs for starting/peak loads and powers accessories as a house battery
- Maintenance-free operation—no watering required
- Lightweight design (50–60% less weight than a lead-acid equivalent)
- Charge and storage suited to harsh conditions with temperature tolerance rated up to 149°F (65°C)
- Installation flexibility: can be installed upright or on its side
- High peak performance (HP-Series) with capability to deliver a burst of high current for a short period of time
Intended Use
- Marine starting and house power (dual-purpose use)
- Trolling motor / auxiliary power setups (when wired to appropriate system components)
- General 12V off-grid / backup power applications that require a Group 31 LiFePO4 battery
Product Details
- Preserved product title: RELiON RB100HP LiFePO4 Lithium Iron Phosphate 12V Battery, Group 31
- SKU / Variant identifier: 569-RB100HP
- Voltage / system class: 12V
- Battery chemistry: LiFePO4 (lithium iron phosphate)
- BCI group size: Group 31
- Capacity (from spec data): 100 Ah @ 25°C (77°F)
- Energy (from spec data): 1280 Wh
- Dimensions (L x W x H): 13.0 x 6.8 x 8.4 in (329 x 172 x 214.7 mm)
- Weight: 29.8 lb (13.5 kg)
- Terminal type (from spec data): M8 x 1.25 x 12mm
- Terminal torque (from spec data): 80–100 in-lbs (9–11 N-m)
- Case material (from spec data): ABS & PC blend (UL94-V0 flame rating)
- Enclosure protection (from spec data): IP67
- Charging voltage guidance (recommended): 14.4–14.8 V
- BMS charge voltage cut-off (from spec data): 15.4 V (3.85 ±0.025 vpc)
- Reconnect voltage (from spec data): 14.6 V (3.65 ±0.05 vpc)
- Balancing voltage (from spec data): 14.4 V (3.6 ±0.025 vpc)
- Charge acceptance / current capability (from spec data): Maximum Continuous Charge Current 5–50 A; Maximum Battery Charger Output 100 A; Peak Charge Acceptance 165 A for up to 1 minute
- Maximum engine alternator size (from spec data): 150 A
Parts Desk Insights
Best Use Case: A strong choice when you want one 12V LiFePO4 battery that can handle peak/current demands associated with starting while also supporting deep-cycle house loads—ideal for clean, low-maintenance power systems on boats or in 12V applications.
Common Issues: Most performance issues come from using an incompatible charging setup or incorrect wiring to the battery system. Verify your charger/alternator charging profile matches LiFePO4 requirements, ensure terminals and mating hardware are properly torqued, and confirm the battery is installed securely in the orientation your system supports.
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Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.