Two-way lossless active balancing function, improving battery efficiency by 95% It can be used for ion lithium, lithium LTO, manganese acid, and lifepo4 It has protection functions such as overcharge, overdischarge, overcurrent, and short circuit Working voltage 12V-40V Real-time, active balance, balance current 2A Internal resistance of the main circuit: 0.3mΩ continuous discharge 200A, discharge 400A Start current max 3000A over current can be adjusted 10-200A The single voltage range is 1V-5V, accuracy is ±3mV Bluetooth communication function, equipped with APP, can check the battery status in real time Provide external communication interface RS485 (need to buy rS485 module separately ) or GPS Support alarm port. Support battery heating function . Supoort in parallel use. Overcharge protection voltage 1.2V-4.4V adjustable Adjustable overcharge release voltage 1.2V-4.4V adjustable Overcurrent release time 2-600S adjustable Over-discharge protection voltage 1.2-4.4V adjustable (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:PCB Package Contents: 1 * 4S-8S 2A Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.