Nomad Gear Finder
Timeusb 12V 140Ah Bluetooth LiFePO4 Lithium Battery for Marine, Rv, Of-Grid | BCI Group 31, Low-temp Protection, 150A BMS, 700A Discharge @1s, Deep Cycle Batteries for Trolling Motor, Boats, Solar Power
A Group 31 drop-in 12 V 140 Ah battery with Bluetooth 5.0 monitoring, a 150 A BMS and 700 A peak discharge, in an IP65 case. At 28.1 lbs it is lighter than most batteries of similar capacity listed, and its peak current is higher than most 12 V models here. It has low-temperature charge cut-off but no heating, so it suits boats and trolling motors in mild weather.
- Battery capacity
- 140 Ah
- Voltage
- 12 V
- Max continuous discharge
- 150 A
- Peak discharge current
- 700 A
- Brand
- Timeusb
Rankings in the liFePO4 batteries Category
How does this product compare with others in Nomad Gear Finder's liFePO4 batteries category?
- Peak discharge current 700 A Higher than 79% of 34 others
- Weight 28.10 lbs Lower than 73% of 88 others
- Width 6.77 in. Lower than 71% of 73 others
Compare this product with close matches Compare with all liFePO4 batteries
Videos for this product
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Specifications
These details are subject to change and may not be current. Please check Amazon or manufacturer web site to confirm before purchase; see our About page for more information.
Core specs
- Battery capacity
- 140 Ah
- Voltage
- 12 V
- Max continuous discharge
- 150 A
- Peak discharge current
- 700 A
- Cycle lifespan
- 15,000+ Cycles
Temperature Range
- Low-temp charge cut-off
- Yes
- Charging temp min
- 32 ℉ 0 ℃
- Discharging temp min
- -4 ℉ -20 ℃
Internals
- App connectivity
- Bluetooth 5.0
- Built-in Bluetooth
- Yes
Physical Attributes
- BCI group size
- Group 31
- Weight
- 28.10 lbs
- Width
- 6.77 in.
- Length
- 13.00 in.
- Depth/Height
- 8.70 in.
- IP rating
- IP65
Warranty & Certification
- Warranty
- 5 Years
- Certifications summary
- CE, FCC, RoHS
- CE marked
- Yes
Physical Attributes
- Form factor
- Drop-in (Group 31)
Features
Details from the Timeusb Amazon listing:
- 【BLUETOOTH 5.0 REAL-TIME MONITORING】Monitor critical power metrics—voltage, current, and capacity, temperature and battery health—directly from your phone. Stay confident and focused on every fishing trip without worrying about unexpected power loss.
- 【LOW-TEMPERATURE PROTECTION】 Designed to operate efficiently even in cold environments, Timeusb 12V 140Ah Lithium battery features low-temperature protection, ensuring reliable performance in various weather conditions. Automatically disconnects from charging when the cell temperature drops below 32°F (0°C). The discharging cut-off temperature is -4°F (-20°C), and charging resumes at 41°F (5°C).
- 【PREMIUM AUTOMOTIVE-GRADE CELLS】Engineered with top-tier automotive-grade LiFePO4 cells, this battery is built for long-term reliability. Certified to CE, FCC, and ROHS standards, it delivers consistent performance for up to 15,000 cycles—equivalent to over 10 years of service life, even at 60% depth of discharge.
- 【UPGRADED 150A BMS WITH FULL PROTECTION】 Engineered to withstand electrical and environmental challenges. The 150A BMS (700A surge) offers full-circuit protection, with an IP65 enclosure that effectively resists humidity and salt spray.
- 【COMPACT & LIGHTWEIGHT DESIGN】At only 28.1 lbs, this battery is 1/3 the weight of a lead-acid equivalent, making it easy to lift and install. It seamlessly fits into existing Group 31 battery trays, yet delivers 140Ah of capacity—40% more power than a standard Group 31 battery.
- 【5-YEAR WARRANTY & LIFETIME SUPPORT】Timeusb backs every battery with a solid 5-year warranty and lifetime technical support. Our dedicated customer service team is here to deliver expert solutions and guarantee your total satisfaction—no hassle, just reliable support.Timeusb: Power That Works As Hard As You Do！
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 Renogy RBT12100LFP-M |
|
|---|---|---|---|---|
| Price | $289.99 | $479.99 | $503.49 | $289.99 |
| Model | – | – | WT12V314AH200MINIBT | RBT12100LFP-M |
| Popular brand | – | Yes | – | Yes |
| Battery capacity Ah | 140 | 165 | 314 | 100 |
| Battery capacity Wh | – | 2,112 | 4,019 | – |
| Voltage V | 12 | 12 | 12 | 12 |
| Max continuous discharge A | 150 | 165 | 200 | 100 |
| Peak discharge current A | 700 | 825 | 600 | 300 |
| Charge voltage V | – | 14.4 | 14.6 | – |
| Max charge current A | – | 165 | 200 | 100 |
| Cycle life (100% DoD) cycles | – | 4,000 | – | – |
| Cycle lifespan | 15,000+ Cycles | – | 6,000+ Cycles | 5,000 Cycles to 80% Original Capacity |
| Self-discharge %/month | – | 2.0 | 3.0 | – |
| Max expanded capacity Wh | – | – | 64,307 | 20,480 |
| Max batteries in parallel | – | 4 | 4 | 4 |
| Max batteries in series | – | 4 | 4 | 4 |
| Self-heating | – | Yes | – | No |
| Low-temp charge cut-off | Yes | Yes | Yes | Yes |
| Charging temp min ℉ | 32 | 32 | 32 | 32 |
| Charging temp min ℃ | 0 | 0 | 0 | 0 |
| Discharging temp min ℉ | -4 | -4 | -4 | -4 |
| Discharging temp max ℉ | – | 140 | 140 | 140 |
| Discharging temp min ℃ | -20 | -20 | -20 | -20 |
| Discharging temp max ℃ | – | 60 | 60 | 60 |
| App connectivity | Bluetooth 5.0 | Bluetooth 5.0 | Bluetooth 5.0 | – |
| Built-in Bluetooth | Yes | Yes | Yes | No |
| Terminal type | – | – | M8 | M8 |
| BCI group size | Group 31 | 31 | – | Group 22NF |
| Weight lbs | 28.10 | 32.20 | 59.52 | 21.80 |
| Weight kg | – | – | 27.00 | 9.90 |
| Width in. | 6.77 | 6.77 | 7.64 | 5.43 |
| Width mm | – | – | – | 138 |
| Length in. | 13.00 | 13.00 | 15.12 | 9.02 |
| Length mm | – | – | – | 229 |
| Depth/Height in. | 8.70 | 8.50 | 9.76 | 8.39 |
| Depth/Height mm | – | – | – | 213 |
| Housing material | – | – | ABS plastic | – |
| IP rating | IP65 | IP65 | IP65 | IP65 |
| Warranty | 5 Years | 5 years | 5 Years | 5 Years |
| Certifications summary | CE, FCC, RoHS | FCC, CE, RoHS, UN38.3 | IEC, RoHS, CE, FCC, UN38.3 | MSDS, UN38.3, FCC, CE, PSE, RCM, IC, RoHS, UKCA |
| UN 38.3 tested | – | Yes | Yes | Yes |
| CE marked | Yes | Yes | Yes | Yes |
| Charging temp max ℉ | – | 122 | – | – |
| Charging temp max ℃ | – | 50 | 70 | – |
| Form factor | Drop-in (Group 31) | – | – | Drop-in (Group 22NF) |
| Can be mounted on its side | – | – | – | Yes |
| Recommended charge current A | – | 33 | 63 | – |
| Cycle life (80% DoD) cycles | – | 6,000 | 6,000 | – |
Prices from Amazon as of . Product prices and availability are accurate as of the date and time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of the product. As an Amazon Associate I earn from qualifying purchases.
Specifications last updated Nov 5, 2026.