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This 12V 20ah lithium battery is powerful yet compact enough to fit in many deep cycle applications. The RB20 is a lithium iron phosphate (LiFePO4) battery with more power, less weight and lasts much longer than its lead-acid counterparts. It’s longer life span provides exceptional lifetime value. The 20 ah of capacity provides ample power for high amp draw electronics for times when you need a longer run time. It’s suitable in many applications where you need a long lifespan and quick charge capability or in outdoor/recreational use where lighter weight and capacity are key. It’s commonly used in the following applications: fishing electronics, robotics, solar lighting, remote power, outdoor adventures and other deep cycle applications.
RELiON lithium batteries provide more energy for high consumption than traditional lead-acid batteries. They also offer ultra-fast charging and discharging, high efficiency and a longer cycle life – plus no maintenance!
Not all lithium batteries are created equal. All RELiON Batteries use the safest and most stable components, including a LiFePO4 cathode and a built-in Battery Management System (BMS). The BMS ensures a long lifetime, safe handling – and high-accuracy State of Charge (SOC) calculations.
Electrical Specifications |
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Nominal Voltage | 12.8 V |
Nominal Capacity | 20 Ah |
Capacity @ 25A | 48 min |
Energy | 256 Wh |
Resistance | ≤60 mΩ @ 50% SOC |
Efficiency | 99% |
Self Discharge | <3% per Month |
Maximum Modules in Series | 3 |
Mechanical Specifications |
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Dimensions (L x W x H) | 7.1 x 3.0 x 6.7” 181 x 76 x 169 mm |
Weight | 5.6 lbs (2.55 kg) |
Terminal Type | M6 |
Terminal Torque | 35 - 44 in-lbs (4 - 5 N-m) |
Case Material | ABS |
Enclosure Protection | IP56 |
Cell Type - Chemistry | Cylindrical - LiFePO4 |
Discharge Specifications |
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Maximum Continuous Discharge Current | 20 A |
Peak Discharge Current | 40 A (7.5 s ±2.5 s) |
BMS Discharge Current Cut-Off | 70 A ±10 A (20 ±5 ms) |
Recommended Low Voltage Disconnect | 11 V |
BMS Discharge Voltage Cut-Off | 8 V (2.0 ±0.08 vpc) (140 ±60 ms) |
Reconnect Voltage | 10 V (2.5 ±0.10 vpc) |
Short Circuit Protection | 200-500 µs |
Charge Specifications |
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Recommended Charge Current | 1 A - 10 A |
Maximum Charge Current | 20 A |
Charge Current 32ºF to 14ºF (0 to -10 ºC) | ≤0.1 C |
Charge Current -4ºF to 14ºF (-20 to -10 ºC) | ≤0.05 C |
Recommended Charge Voltage | 14.2 V - 14.6 V |
BMS Charge Voltage Cut-Off | 15.2 V (3.8 ±0.025 vpc) |
(1.1 ±0.4 s) | |
Reconnect Voltage | 14.4 V (3.6 ±0.025 vpc) |
Balancing Voltage | 14.4 V (3.6 ±0.025 vpc) |
Temperature Specifications |
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Discharge Temperature | -4 to 140 ºF (-20 to 60 ºC) |
Charge Temperature* | -4 to 113 ºF (-20 to 45 ºC) |
Storage Temperature | 23 to 95 ºF (-5 to 35 ºC) |
BMS High Temperature Cut-Off | 158 ºF (70 ºC) |
Reconnect Temperature | 122 ºF (50 ºC) |
*Refer to charge currents below 0°C (32°F) |
Compliance Specifications |
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Certifications | CE (battery) |
UN38.3 (battery) | |
UL1642 & IEC62133 (cells) | |
Shipping Classification | UN 3480, CLASS 9 |