Do you use rechargeable batteries at home? Of course, you do! But the thing is rechargeable batteries are undeniably much more expensive. They are not cheap! Before throwing out any battery you should test them to see if they can be restored.
And guess what? It will not only save you money but it is also an environmentally friendly thing to do! Batteries packed with chemicals that seep into our soils and end up in our waterways. So you got to care your batteries to make them last for a long time. You can get more information regarding high energy density batteries at http://nuenergystorage.com
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Here's a list of easy tips you can use to prolong the life of NiCd or NiMH batteries.
Don't overcharge! Overcharging is very bad for your battery's longevity! Better not leave the battery in the charger for more than a day after it has been fully charged. Disconnect it when you see the "Full" indicator on the charger. Do it even your charger has an automatic cut off feature!
Regular full discharge cycle. You can do this by running the battery down in the equipment until it is dead. Do it at least once a month. It's good to prevent the memory effect.
Discharge before a recharge is BAD! It can work with the older type of rechargeable batteries but, be careful! Don't do it with the modern type. Regular discharging will put undue stress on the battery which will reduce its lifespan.
Better keep to it cool! Don't let the battery to be too hot when charging. When in this process, it should heat up a little and then it should cool off when fully charged. You see, excessive heat may cause the battery to explode!