[928uk] Charge rates for Bosch Silver 7C

Fri Feb 24 22:13:27 UTC 2012

Does anyone have any thoughts on the best charge rate for a Bosch silver 7c that is too flat to crank the engine.  The accumate maintainer won't touch it now, so I have a heavier duty charger lined up that indicates  8 amp fast charge 2.5amps slow charge rate.

The earth strap is disconnected during charging.

Joe Field
92GT

On 24 Feb 2012, at 11:12, "ronald littlewood" <ronaldlittlewood at yahoo.com<mailto:ronaldlittlewood at yahoo.com>> wrote:

Here we go again My most recent problem was a poorly battery & a not so well charger I,m sure the battery is on its way to battery heaven & the charger cost me a £5 er off ebay I do have some quality chargers & batteries but in a different garage  .The battery in question was on my shopping trolley Corsa but have changed it now .
I could write a book on Battery chargers which I have worked in yes that right IN . Theres nothing like a walk in battery charger to get the neck hairs prickling. Happy charging Ron

--- On Fri, 24/2/12, Paul Lacey <t595 at btopenworld.com<mailto:t595 at btopenworld.com>> wrote:

From: Paul Lacey <t595 at btopenworld.com<mailto:t595 at btopenworld.com>>
Subject: Re: [928uk] Battery for a 86 S2
To: "Kevin Fearon" <kevin_fearon at yahoo.co.uk<mailto:kevin_fearon at yahoo.co.uk>>, "ronald littlewood" <ronaldlittlewood at yahoo.com<mailto:ronaldlittlewood at yahoo.com>>, "Paul R Smith" <smiffypr at clear.net.nz<mailto:smiffypr at clear.net.nz>>
Cc: "928uk at lists.928.org.uk<mailto:928uk at lists.928.org.uk>" <928uk at lists.928.org.uk<mailto:928uk at lists.928.org.uk>>
Date: Friday, 24 February, 2012, 10:24

Hi,
The Accumate is an excellent charger, I have two of them and use them frequently on my bike and 928 batteries to keep them tip top. The charger comes with a flying lead you can leave connected to the battery so you don't need to dig the battery out of the car / bike. Extra flying leads are about £4.50 if you have several vehicles.
However they are not suitable to connect to your 928 if the battery is totally dead without disconnecting the battery from the car, this is because they can supply 18v when trying to revive a dead battery.
They are also low current (originally designed for bike batteries) so I use a "normal" charger initially on a very flat battery and then the Accumate to condition it.
I use one of these and it's very good, I can highly recommend it: http://www.theultimatefinish.co.uk/ring/rcb312-6-12v-12-amp-workshop-charger.aspx

Regards,
Paul Lacey

From: Kevin Fearon <kevin_fearon at yahoo.co.uk<mailto:kevin_fearon at yahoo.co.uk>>
To: ronald littlewood <ronaldlittlewood at yahoo.com<mailto:ronaldlittlewood at yahoo.com>>; Paul R Smith <smiffypr at clear.net.nz<mailto:smiffypr at clear.net.nz>>
Cc: "928uk at lists.928.org.uk<mailto:928uk at lists.928.org.uk>" <928uk at lists.928.org.uk<mailto:928uk at lists.928.org.uk>>
Sent: Friday, 24 February 2012, 9:53
Subject: Re: [928uk] Battery for a 86 S2
Hi Ron,

I have been using this charger for a couple of years, with very satisfactory results.

http://www.accumate.co.uk/accumate.htm

It has even recovered a discharged motor cycle battery that been sitting around for a year. I was ready to dispose of it but thought I would connect it up and give it a go. Very pleasing!
See the FAQs below for the statement about suphated batteries.

http://www.accumate.co.uk/optiFAQ1.htm

I would always try this before buying a replacement battery. No guarantee that it will recover every battery of course, but you will always need a battery charger.
My justification for the expense was to 'buy once, buy wisely'.

Kindest regards,

Kevin

From: ronald littlewood <ronaldlittlewood at yahoo.com<mailto:ronaldlittlewood at yahoo.com>>
To: Paul R Smith <smiffypr at clear.net.nz<mailto:smiffypr at clear.net.nz>>
Cc: "928uk at lists.928.org.uk<mailto:928uk at lists.928.org.uk>" <928uk at lists.928.org.uk<mailto:928uk at lists.928.org.uk>>
Sent: Friday, 24 February 2012, 9:38
Subject: Re: [928uk] Battery for a 86 S2
Hi Smiffy I knew you would have some valuable input please keep us posted I have several battery chargers & am always messing with them .Please keep us posted my problem is I have more than 1 vehicle & sometimes go away for long periods & forget to put trickle chargers on Happy motoring Ron

--- On Fri, 24/2/12, Paul R Smith <smiffypr at clear.net.nz<mailto:smiffypr at clear.net.nz>> wrote:

From: Paul R Smith <smiffypr at clear.net.nz<mailto:smiffypr at clear.net.nz>>
Subject: Re: [928uk] Battery for a 86 S2
To: 928uk at lists.928.org.uk<mailto:928uk at lists.928.org.uk>
Date: Friday, 24 February, 2012, 3:43

An old battery left flat for a week will be pretty stuffed, so for reliability I can understand Feisal wanting a new battery. Your problem sounds like it was the battery charger not recognising a flat battery as a battery. That is where a cheap basic battery charger is a good option. As for batteries which won't take any charge current, they often will if left on the charger long enough, but they probably will never be very good. I'm currently experimenting with a "desulphator", an electronic device which applies short high voltage pulses to clean up the lead plates. I'll report back when I know how well it works. Smiffy On 24/02/2012 4:37 a.m., ronald littlewood wrote:
Hi Have you another Battery & a Battery charger? if so try charging the 2 batteries in parellel This worked for me a long time ago. some batteries wont charge if completely flat some chargers wont charge if battery seems dead, its worth a try I,m sure Obi wan Smiffy will advise Happy motoring Ron

--- On Thu, 23/2/12, Feisal Ali <feisal7 at gmail.com><http://uk.mc316.mail.yahoo.com/mc/compose?to=feisal7@gmail.com> wrote:

From: Feisal Ali <feisal7 at gmail.com><http://uk.mc316.mail.yahoo.com/mc/compose?to=feisal7@gmail.com>
Subject: [928uk] Battery for a 86 S2
To: 928uk at lists.928.org.uk<http://uk.mc316.mail.yahoo.com/mc/compose?to=928uk@lists.928.org.uk>
Date: Thursday, 23 February, 2012, 13:49

Hi
Alas I left the interior light for a week and the battery was so dead even the AA were no good. I need to replace it. The one in there is a Bosch S3 007 . Any other thoughts?
Cheers
Feisal

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