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- Path: sparky!uunet!stanford.edu!agate!ucbvax!SIERRA.STANFORD.EDU!siegman
- From: siegman@SIERRA.STANFORD.EDU ("Anthony E. Siegman")
- Newsgroups: rec.autos.tech
- Subject: Electrical Question: Multiple Batteries?
- Message-ID: <CMM.0.90.0.713813115.siegman@Sierra.Stanford.EDU>
- Date: 14 Aug 92 17:25:15 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Lines: 25
-
- Anyone out there with experience on using, and recharging, multiple
- batteries in a vehicle?
-
- My son is a small contractor, one of whose vehicles is a big old parts
- van. The van gets driven to a job site, then sits immobile for 3
- weeks, holding job supplies and a communications radio for the job
- crew which is left on 8 hours/day. This is too much for the regular
- battery; after 3 weeks it's dead.
-
- Proposal: Install a heavy-duty (marine?) battery for the radio, plus
- an AB switch. Drive to the site on the regular battery, then switch
- to the heavy-duty backup. When it's time to drive home, switch back
- to the regular battery, start the truck, and drive home. Recharge the
- heavy-duty battery either with a 110 V trickle charger at home, or by
- switching back to it after the engine is started.
-
- Any pitfalls in this? Will the truck's regular alternator and voltage
- regular (12 V) be able to charge the heavy-duty battery also without
- damage? Are there other ways to do this?
-
- (We already know that just paralleling two batteries is a bad idea.)
-
- Responses best to siegman@sierra.stanford.edu, alternatively to
- rw.aap.stanford on Bitnet.
-
-