yuasa 4a/h lead acid sealed battery

Submitted: Monday, Feb 21, 2005 at 22:03
ThreadID: 20653 Views:2018 Replies:4 FollowUps:4
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A salesman at battery world was telling me how it would be o.k to run these batteries down to say 80% on a regular basis and it would't be detrimental to it. I have been only taking about 2a/h 50% before recharging thinking that this was the best way to go as it isn't a deep cycle battery. Any one out there can point me in the right direction? cheers and happy travelling
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Reply By: Member - Sand Man (SA) - Monday, Feb 21, 2005 at 22:20

Monday, Feb 21, 2005 at 22:20
If its an AGM style battery he/she is probably about right.

4a/h ???? Pretty small battery though. What are you using it for?

I have an 18a/h AGM battery in my Jump Starter pack and that is small enough.
Bill


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AnswerID: 99398

Follow Up By: pixiemops - Monday, Feb 21, 2005 at 22:25

Monday, Feb 21, 2005 at 22:25
Hi Sand Man I just use it to run a computer fan for the fridge
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FollowupID: 357707

Follow Up By: Mike Harding - Tuesday, Feb 22, 2005 at 07:50

Tuesday, Feb 22, 2005 at 07:50
"pixiemops"! You have to just love that name :)

A good rule of thumb with any lead acid battery (sealed or not) is not to allow the terminal voltage to fall below 11V. It can go a bit lower, but not a lot and never less than 10V5.

I suggest you buy a small digital multimeter from Dick Smith or Jaycar - they both do one for $10 - although I would suggest you spend a little more ($25) and get the Jaycar QM1526 instead.

At a guess, the above suggestion will allow you to run the fan for about 24 hours from a 4Ah battery.

Mike Harding
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FollowupID: 357742

Reply By: David Au - Tuesday, Feb 22, 2005 at 06:54

Tuesday, Feb 22, 2005 at 06:54
"A salesman at battery world" does that not say it all.
Tell the salesman to go and get some basic lessons and education in what he/she sells. Battery World are a franchise that people buy a job and usually technically bereft with no formal education in the field. Try it as a hobby and go into their stores and ask questions and see all the different and incorrect answers you get. Eventually you may find one that knows something.

Of course it will be detrimental to the battery discharging it below 50%. Battery World would be happy to tell you anything that would wreck your battery and make you buy more batteries. Next time try the Jaycar SLA batteries.
AnswerID: 99433

Follow Up By: Nudenut - Tuesday, Feb 22, 2005 at 08:11

Tuesday, Feb 22, 2005 at 08:11
"Try it as a hobby and go into their stores and ask questions and see all the different and incorrect answers you get. Eventually you may find one that knows something"

he doesnt need to David......you say it all for them!
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FollowupID: 357749

Reply By: AdrianLR - Tuesday, Feb 22, 2005 at 09:51

Tuesday, Feb 22, 2005 at 09:51
Have a look at this doc from Electus (Jaycar trade arm) which gives a good overview of SLAs

http://www1.electusdistribution.com.au/images_uploaded/slabatts.pdf

SLA info
AnswerID: 99469

Reply By: pixiemops - Tuesday, Feb 22, 2005 at 10:35

Tuesday, Feb 22, 2005 at 10:35
Thanks alot guys . Just goes to show you can't trust a salesman.
AnswerID: 99477

Follow Up By: Member - Phil G (SA) - Wednesday, Feb 23, 2005 at 18:24

Wednesday, Feb 23, 2005 at 18:24
I've been using the Yuasa 7Ah gel cells for the past 12 years for running camp lights and other odd bits and pieces. They are indestructable, and I believe are better quality than the Clinese ones that Jaycars sell.

Gel cells can be treated as deep cycle batteries, but be sure to recharge them as soon as you are able.

Cheers
Phil
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FollowupID: 358042

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