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Rockbox mail archiveSubject: Re: BATTERY-FAQ and the FMRe: BATTERY-FAQ and the FM
From: Nix <nix_at_esperi.demon.co.uk>
Date: Sun, 08 Jun 2003 22:07:31 +0100 On Fri, 6 Jun 2003, Martin stipulated: > NOW JOHN.....READ THIS BELOW > > The development of Lithium-Ion (Li-Ion) based batteries retained > the beneficial electrochemical properties of metallic lithium without > exhibiting most of the safety drawbacks. However, care must still be > taken to not overcharge a Li-Ion battery. Overcharging results in the > formation of pure lithium metal, which can react and cause overheating, > fire and even explosions in extreme cases. Correct. (This comes from the Cadex `Batteries for a Portable World' book, right? I think I recognise the phraseology.) > Most Li-Ion batteries > have built in safety mechanisms such as pressure actuated > electrical disconnect to prevent the most drastic consequences, but > careful circuit design must still be done to ensure that the battery is > not overcharged. At the very least, the battery will be damaged and > have a shorter lifetime. This is what the LTC1734 chip is for. It works. Believe me, you'd know if it didn't; `venting with flame' isn't something you'd fail to notice. `Small explosion' is a better description. (Looks cool, but it's a good idea to make sure you don't care about the batteries in question and that they're not in something you care about :) ) -- `It is an unfortunate coincidence that the date locarchive.h was written (in hex) matches Ritchie's birthday (in octal).' -- Roland McGrath on the libc-alpha listReceived on 2003-06-08 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |