Sony announced a new type of lithium ion battery today that recharges up to 99% in 30 minutes, and lasts 4x longer than the typical rechargeable batteries. And even after 2000 charge-cycles they maintain up to 80% of their ability to retain a charge. Not bad Sony. Sadly, these are available only for Power Tools currently.
New Sony Rechargeable Battery Has 4X The Lifespan Of Current Lithium Ion Batteries | Sony Insider
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