Would the "iMaxRC iMax B3 Pro Compact 2S 3S Lipo Balance Battery Charger" work for a 3 cell Li-Ion battery? It is the stock battery from Redcat's Volcano 18 V2 so 7.4v.

cimg1.ibsrv.net/gimg/www . rctech.net-vbulletin/2000x1124/80-20180123_130420_1__1b9f17491837f685dfb616679b2a32d 439a32736 . jpg
(Input and output for stock adapter)

Yes, there are 2 ports on the charger, simply plug in the balance port from the battery to charge it, the one of the left is for 2S and the one on the right is for 3S