1.N orm al condition : lead-acid battery w ith good cost perform ance
and fee m aintenance
2.low tem perature condition : U sing colloid storage battery if the
tem perature is low er than -7℃ and underground style is suggested
3.high tem perature condition : U sing N i-C d battery if the tem perature
is alw ays m ore than 45℃ . H ow ever colloid battery w ith underground
style are best w ay to keep battery long life.