Answer / kaushal

For battery backup,it is neccesary to connect battery in series.Because in case of series connection of batteries,
v=v1+v2+.....Vn while in case of parell connection 1/v=1/v1+1/v2+....+1/vn

Answer / pundlik wanwe

Series combination is used for the batteries as to get the required voltage. Battery capacity (ampere-hour) shall be of same

Answer / zilmil

parallel

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