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Comparing Ah: Which 20V Lithium-Ion batteries will provide a longer run time (on a String Trimmer, before recharging): one 5.0Ah or two 3.0Ah batteries? The 20 Volt 3000mAh Lithium Battery is here, and the 20V 5.0Ah Lithium Battery is here.

Aluminium ions are stored between layers of graphite when the battery is charged A new rival to the lithium-ion battery has been created that charges in under a minute and still performs almost perfectly after being recharged thousands of times. The new battery is based on aluminium instead of lithium, which should make it both cheaper and safer than their lithium-ion competitors. The U.S. team behind the aluminium-ion battery say that the technology could find its way into the home, help store renewable energy for the power grid and even power vehicles. The aluminium-ion battery is conceptually similar to the...

Toshiba has today announced a new lithium ion battery, which, it claims, can recharge 80% of the battery's energy capacity in just one minute, 60 times faster than the other lithium ion cells. It takes an unspecified 'few' more minutes for a complete recharge. The battery has a long life cycle, losing only 1% of its capacity after 1,000 cycles of discharging and recharging. Due to be launched next year, it will initially be used to power hybrid electric vehicles but could be used for smaller devices in future, such as mobile phones and digital cameras.