As for suitable environment, if the environment temperature is high, in general, as a benchmark at 25 degrees, life halved every 10 degrees;And charging conditions, if often owe charge, charge of less than, so, they quickly "broken", a single cycle of charging amount should be more than 12 times the dischargeAnd the depth of discharge, such as release at a time battery capacity of 30% in real terms, you can cycle more than 1500 times, which is about 4 years, but if every time at 80%, is only a little more than a year, 100% is about 1 years.