home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.laptops
- Path: sparky!uunet!nwnexus!Celestial.COM!camco!dyndata!dynasty!dan
- From: dan@dyndata.uucp (Dan Everhart)
- Subject: Re: Nickel Hydride Batteries
- Reply-To: dan@dyndata.com
- Organization: Dynamic Data & Electronics
- Distribution: comp
- Date: Wed, 29 Jul 1992 19:36:36 GMT
- Message-ID: <DAN.92Jul29113636@dynasty.dyndata.uucp>
- In-Reply-To: schuster@panix.com's message of 23 Jul 92 19: 55:23 GMT
- References: <DAN.92Jul22175414@dynasty.dyndata.uucp>
- <1992Jul23.195523.28010@panix.com>
- Sender: dan@dyndata.uucp (Dan Everhart)
- Lines: 27
-
- In article <1992Jul23.195523.28010@panix.com> schuster@panix.com (Michael Schuster) writes:
-
- > BUT(!!!!) the batteries have a nominal life of about 500 cycles. Toshiba
- > has said that every time you charge the batteries to completion (i.e.
- > they start to heat up at full charge) .... THAT'S ANOTHER CYCLE.
- > You could be charging from full discharge, or topping it off ...
- > and that's 1/500th of the life gone.
-
-
- Whoa. That sucks. Aren't NiCd's up in the 1000's of cycles? These
- Toshiba batteries are expensive too, like $125. So each topping off
- costs $0.25. I'd almost prefer NiCd's in that case, in spite of the
- memory. (I thought memory was not a problem any more in modern
- Nicads, and in any case you can blow away the memory with a particular
- charge/discharge technique, right?)
-
- Looks to me like you could cram about 12 AA Nicad cells in the space
- of a T2200 battery pack, but that would give you only 500 mAh compared
- to the Toshiba's 2200 mAh. Is nickel hydride 4x more space efficient
- than nickel cadmium?
-
- --
- _ dan@dyndata.com
- / \_ Dan Everhart uunet!{camco,fluke}!dyndata!dan
- \_/ \____________________________ 206-743-6982, 742-8604 (fax)
- / \_/ 7107 179th St SW
- \_/ Dynamic Data & Electronics Edmonds, WA 98026, USA
-