有誰(shuí)做過(guò)此類(lèi)充電器.或者哪里有類(lèi)似此款充電器的外殼賣(mài),謝.
Description: Charger, Li-ion Battery,
                         7.35 Ah 4S3P
2.5mm Jack Input, TT253      Plug        Output

Ratings:
20W Li-ion 4S Charger
24VDC Input, 3 A
16.8 VDC output, 3000mA

Connections:
Input: 2.5mm ID Barrel, center positive
Output: Cord 24” long, Plug Connector SwitchCraft TT253


Li-ion Battery,
(7.35 Ah 4S3P)中4s3p表示什麼意思?