The difference in
BackUPS 400 BackUPS Pro 420C BackUPS 400B BackUPS Pro 420PNP BK250B
100 X AA 1000 mAh NiCd
you may consider using the Alkaline A186/LR43 in its
370 Mah It is designed specifically for your device
Battery for mitsubishi a, a1fxcpu, a1s, a2s, ans, mr-j2, mr-j2a, mr-2js, Allen Bradley The difference inPlease Note: This product Cannot be Shipped via Fedex Express due to Lithium Metal Air Shipping restrictions. If you select Fedex Express the shipment will automatically be shipped Via Fedex Ground. Canadapost will also carry this product by ground shipment if selected. The Battery for Mitsubishi A, A1FXCPU, A1S, A2S, AnS, MR J2, MR J2A, MR 2JS, and others. Replaces battery Models A6BAT, A6BAT MRBAT, C52012, LIBAT H, MR BAT ,501482 001, 63 000166 02,