This 12v 50Ah Lithium Battery is ideal if you are powering a small load, but still want all the benefits of a high quality lithium battery over a sealed lead acid battery.
This lithium iron phosphate battery has a high cycle rate (2000 cycles), it can handle high discharge currents (Max 50A), and the internal battery management system (BMS) protects the battery from overcharging, or discharging too low and a short circuit.
Other advantages of these Lithium batteries are that there are no fumes, the self-discharge rate is only 3.5% per month (SLA will drain itself dead in 12 months), the batteries weight 6.8kg vs the 28kg average weight of a 12v 100Ah SLA battery, and they can be charged and discharged faster (at higher current).
This battery can directly replace a sealed lead acid battery in terms of charging voltages, and is an upgrade in terms of how many cycles the battery can do (charged and discharged before needs replacing), but it is of a smaller energy storage capacity than a 12v 100Ah it is often replacing.
Can this battery last long enough for your application? This is complicating for a SLA battery, but simple to calculate for a lithium battery, see the capacity calculation below.
CAPACITY / RUNTIME : To calculate how long this battery can last in your application, lookup or measure the load power of the device(s) it will be powering in Watts, then divide 640W with that number. Example, a small inverter, with an average 150W load, can run from this battery for 4hrs 16min (640 / 150 = 4.267).
IMPORTANT : These cannot be used to start or operate a vehicle. The BMS cannot handle the very high instant current requirement.
INVERTER APPLICATION NOTE: Each inverter has it's own charging parameters that are not customizable in most cases, so the full capacity might not be usable. In most cases it means the battery will last even longer, since it is not being fully drained, which is actually a good restriction.
Example of tested inverters:
- Mecer 720W 12v Inverter : The inverter can utilize about 500Wh of total 640Wh capacity. Thus less than a 160W load is recommended if you want 3hrs runtime.
- Geewiz 720W 12v Inverter : The inverter can utilize about 500Wh of total 640Wh capacity. Thus less than a 160W load is recommended if you want 3hrs runtime.
- Synapse 600W 12v Inverter : The inverter can utilize about 500Wh of total 640Wh capacity. Thus less than a 160W load is recommended if you want 3hrs runtime.
