1.Core components (mainly lithium batteries)

Battery cell: mainstream 18650 cylindrical lithium battery (18mm × 65mm), series parallel group.

BMS protection board: overcharge/overdischarge/short circuit/overcurrent/temperature protection, balance, LED power display.

Plastic shell+metal contacts+buckle: anti drop, dust-proof, anti reverse insertion.

2.Mainstream specifications (voltage+capacity)

voltage

12V: Household small electric drill, screwdriver (lightweight).

18V/20V MAX: Industrial mainstream (electric wrench, electric hammer, angle grinder).

36V/40V: Heavy tools, chainsaws, cutting machines.

Capacity (Ah)

2.0Ah/3.0Ah: Lightweight household use, short homework.

4.0Ah/5.0Ah/6.0Ah: Construction site, long endurance, high current discharge.