You should be avoid using up the battery power before charging the battery, because this will give the battery a lot of pressure and resulting in damage. A more feasible approach is to charge the battery when the battery remain about 20-30% of power. In fact, the notebook lithium battery in the number of "use up / charge" times is limited, all used up and then charge will greatly shorten the battery life. At the same time, the battery should be charged in a dry place, and you should also pay attention to the heart problem.
Hot to store the IBM Thinkpad A Series battery, use up the battery power or full charged the battery ? Store the battery with full discharged will make the batteries lose activity, even lead to the control circuit protection self-locking and no longer available. Store the battery with full charged will bring the safety risks, the best preservation method is store it in a cool and dry place with about 40% power, about 20 temperature is the best store temperature, of course you had better use the battery once a month, this can guarantee the battery a good state of preservation, and will not let the battery power completely loss and damage to the battery.
IBM ThinkPad I1500 Series battery fits laptop model: IBM ThinkPad I1400 / I1420 / I1460 / I1480 / I1560
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6600mAh 10.8V Li-ion battery for IBM ThinkPad T60 Series, IBM ThinkPad T61 Series, IBM ThinkPad R60 Series, IBM ThinkPad Z61e.
2200 mAh 14.8V Lithium-ion laptop battery for IBM ThinkPad X60 Series battery / IBM ThinkPad X60s Series