Fine workmanship and durable.
For the rechargeable (generally refers to the lithium battery) from the protection of the integrated circuit board. Lithium battery (rechargeable type) so need protection.
As the lithium battery itself determines the material itself can not be overcharge, over discharge, overcurrent, short circuit and ultra-high temperature charge and discharge, so lithium battery lithium components will always follow a protective resistor with a sampling resistor and a current fuse.

Lampshift maximum discharge current: 15A
Instantaneous discharge current: 25A
Charging voltage: 25.5V
Charging current: 15A (MAX)
Overcharge detection voltage: 4.28 +/- 0.05V
Overcharge protection delay: 0.1S
Overcharge release voltage: 4.08 +/- 0.05V
Over discharge detection voltage: 2.55 +/- 0.08V
Overdischarge detection delay: 0.1S
The overdischarge release voltage: 2.9 +/- 0.1V
Overcurrent detection voltage: 150mV
Overcurrent detection delay: 9MS
Overcurrent protection current: 30 +/- 3A
Overcurrent protection release condition: Disconnect the load
Short circuit detection delay: 250uS
Short circuit protection Release condition: disconnect negative open
Main circuit conduction resistance: less than equal 20m ohm
Working current: less than equal 30uA
Sleep current (battery over discharge) less than equal 10uA
Temperature range: -30 / + 80 Celsius
Condition: New
Type: Voltage Regulator
Model Number: 6S 15A 24V PCB BMS Protection Board
Application: Computer
Operating Temperature: -40-+85
Supply Voltage: 24V
Dissipation Power: 6S
For Arduino STM: electronic module
Type:6S 15A 24V BMS Protection Board
color:Green
Material:PCB
size:32 x 50mm

Package Contents:
2 x protection board