This is probably old news to those of you who use gadgets with lithium-ion batteries.
One of my favorite flashlights is my old Inova T4. It uses a proprietary lithium-ion battery pack. Unfortunately, I haven't used it in a few months, and I let it become discharged. The battery is dead. I think I have had it about 2 years now, but maybe longer. http://us.st12.yimg.com/us.st.yimg.com/I/yhst-25924480583388_2023_25554487 According to one web-site: Some lithium-ion batteries fail due to excessive low discharge. If discharged below 2.5 volts per cell, the internal safety circuit opens and the battery appears dead. A charge with the original charger is no longer possible. Some battery analyzers (Cadex) feature a boost function that reactivates the protection circuit of a failed battery and enables a recharge. However, if the cell voltage has fallen below 1.5V/cell and has remained in that state for a few months, a recharge should be avoided because of safety concerns. To prevent failure, never store the battery fully discharged. Apply some charge before storage, and then charge fully before use. My battery can only be ordered online and cost over $ 31.00 ( not very practical for caving, Right? ) David --------------------------------------------------------------------- Give this to a friend: ot-subscr...@texascavers.com To unsubscribe, e-mail: ot-unsubscr...@texascavers.com For additional commands, e-mail: ot-h...@texascavers.com
