I have two of the original A123 SLA style 7AH sized batteries, model ALM-12V7
and use them with my KX3. They have eight ANR26650 cells arranged in a 4S2P
config. The ALM-12V7s can be arranged in series or parallel systems the same as
ordinary SLAs.
Internal to the battery package are the following circuit functions
- Overcharge protection and pre-charge circuits- 30 A plastic blade fuse
(replaceable)- Charger detection and voltage regulation- Micro controller and
cell balancing- Over discharge protection
Any discharge due to the internal circuits is so small that they recommend
charging every three years if they are kept in storage.
An ordinary lead acid charger can be used or a fixed 14.4V 10A power supply.
There was no specialized A123 charger made for these batteries.
Which model of A123 battery did you have? I think some company used to sell
home made packs based on individual A123 sells and that company hawked their
own charger for their packs.
Jim
On Monday, June 1, 2020, 6:06:09 PM PDT, elecraft-requ...@mailman.qth.net
<elecraft-requ...@mailman.qth.net> wrote:
----------------------------------------------------------------------
Message: 1
Date: Mon, 1 Jun 2020 07:42:45 -0700
From: Eric Norris <norrislawfi...@gmail.com>
Subject: Re: [Elecraft] External battery for KX2, field day and SOTA
--------------The original A123 batteries use a balancing system built into
their specialized chargers, and they hold their
charge much longer. ------------------------
73 Eric WD6DBM
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