Have you ever wondered why some laptops batteries stay in their original state offering the performance they had when they rolled out of the factory? Some say that it's unique to high quality top-notch notebooks, I'm not one of those people. I think a netbook battery is just a piece of hardware that can be kept in shape by avoiding a few stupid mistakes.
And do not freeze the battery, this can be just as destructive. If you think you may want to buy a spare Li-ion battery to have on hand as a back up, don't bother. They have a shelf life so if you do not use it before it ends you have wasted your money. Also check the manufacturing date on a battery you may be buying to be sure the lithium ion batterty stocks expiration is not approaching.
The lithium ion batterty stocks practical EV like the RAV or the Solectria Force. These rigs were designed to get the job done. Many homemade conversions fit into this class as well.
The Leaf, Volt and i-MiEV are available for SALE, not just lease - This is a major difference from the route that Ford, Honda and GM took last time. Honda and GM only made their electric cars available for lease, while Ford leased most Ranger EVs and sold only a few. This means the manufacturer can't take your car back. It's cobalt ontario canada that simple. And if they sell (and they are), then there will be dealer service and factory parts available likely for the life of your EV.
Charge your batteries in an open well ventilated area. If a battery does become unstable you want the hazardous fumes and material to be vented from the room.
2) Avoid deep discharge - When possible, do not allow the battery to go completely dead. Deep discharge will stress its core and will affect its lifespan.
Finally, this tool has provided safety by having a cover over the blade and an electrical braking system. When the stop button is pressed, the blade turns off immediately.