I just bought the lithium-ion battery 18V 2; 2 Ah, to replace the one of a cutting edge Bosch ART 26 LI-2011 (which seems replaced by ART 26-18 LI), lithium-ion batterie18V 1. 3ah that seems to exist. She looks just like, except that it does not fit into the charger 2215 CV I have also since 2011. Is it truly compatible ??? Should I also change with new charger with the same reference (see the description of the trimmer) ??