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From: cyborg@rata.vuw.ac.nz (Alex Ivopol)
Newsgroups: sci.electronics
Subject: Re: Why Are 9v Rechargables Not 9v??????
Message-ID: <1991Feb11.051216.10343@comp.vuw.ac.nz>
Date: 11 Feb 91 05:12:16 GMT
References: <1991Feb11.005844.1630@julius.cs.uiuc.edu>
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In article <1991Feb11.005844.1630@julius.cs.uiuc.edu> totty@flute.cs.uiuc.edu
(Brian Totty) writes:
>	I just bought a set of rechargable batteries and a charger for them.
>	To my surprise, I found out that the 9v batteries were actually only
>	7.2v in a "nine-volt size".  
[...deleted...]
>	Why aren't there true 9v rechargables (and if there are, where can I
>	get them from?  Will they work with my charger?)?

Most rechargable 9V batteries are made of 6 cells in series, each providing
1.2V thus the 7.2 volts.
The following is a quote from a New Zealand Dick Smith Electronics Catalogue:
"Unlike most 9V batteries, which are really 7.2V, this is a true 9V battery
that delivers 100mAh." It refers to a Varta TR7/8 rechargable battery.
The 9V rechargable batteries should work with your recharger if the recharger
provides 10mA constant current at over 9V.