This type of BMS comes with  recovery function-AUTO Recovery).It has Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, a polymer lithium battery).Weight of this BMS is 9.3g (standard / enhanced version), 10.3g (balanced version).Charging voltage of this board is 16.8V – 18.1V.Continuous discharge current (upper limit) is  40A (if the cooling environment is not good, please reduce the load current use).Continuous charge current (upper limit): 20A.It is  suitable for starting current below 80A, power 135W below the drill.
 

The 4S 40A 18650 Lithium Battery Protection Board 14.8V 16.8V with Balance for Motor Lipo Cell Module comes with recovery function AUTO Recovery and Integrated 10 low load resistance MOS tube.

It provides a continuous discharge of 40A, 100mA balanced current, for electric drill/sprayer/LED lights/low power inverters. (If the cooling environment is not good, please reduce the load current use).

Features:

• 4 Cell 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery).
• Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, a polymer lithium battery).
• Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version). Charging voltage: 16.8V 18.1V.
• Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use).
• Continuous charge current (upper limit): 20A.
• Equalization version: suitable for starting current below 80A, power 135W below the drill.