Rechargeable Batteries

Finding really good rechargeable batteries is like gold for a photographer.  I have some great rechargeable batteries that I picked up well over a year ago as a result of reading Michael Andrew’s Blog.  They are a mercury battery, but I can’t find the battery or supplier for them anymore – which leads to the new release of Sony’s latest battery line:
“Sony has announced a new type of lithium ion rechargeable battery that combines high-power and long-life performance, using olivine-type lithium iron phosphate as the cathode material. The Olivine-type lithium iron phosphate used in this new battery is a perfect cathode material due to its robust crystal structure and stable performance, even at high temperatures. These bateries have a high power density of 1800W/kg, and extended life span of approximately 2,000 charge-discharge cycles. What’s most surprising is that the battery will keep an 80% charge retention after those 2,000 charge-discharge cycles, which is very impressive.
This new battery is also able to charge rapidly (99% in 30 minutes). It will first be supplied for use in power tools, then gradually make its way to consumer electronic electronic devices. With lithium ion secondary batteries able to deliver both compact size and high capacity, their usage continues to diversify and grow. This new battery delivers an extended life-span of over four-times existing rechargeable lithium ion batteries used in conventional electronic devices. By adding this high-power, long-life lithium ion rechargeable battery to its lineup, Sony has certainly strengthened its battery business going forward. Here
are some specifications:”