Anyone own a Rolson's 12V Jump Start with Air Compressor unit?
in [Car Maintenance]
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From: Dave Plowman (News) on 2 Sep 2006 04:00 In article <1157182825.388542.133610(a)m73g2000cwd.googlegroups.com>, Trevor Smith <trs55(a)hotmail.com> wrote: > The one I have is not a Rolson it is branded as Bigmaster but it has a > 12v 17ah battery and the mains adaptor is a model HB-DC 12v 500 and > rated at 12v 500ma. Seems my Lidl cheapy was even more of a bargain with a 1 amp charger. ;-) -- *Procrastination is the art of keeping up with yesterday. Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: Lin Chung on 2 Sep 2006 04:48 Trust_No_One wrote: > If so I'd appreciate if you have a look at the mains adapter and let me > know what is written on the back or send me a digital snap. In my flat > clearout I misplaced the mains adapter for the [Rolson 12V jump starter]. > I've found what I think is the mains adapter but I'd like to be certain. Your Rolson probably is this one: http://www.yes661.com/prodDetail.asp?id=14939 This is a dead ringer to the "B Grade Portable Jump Starter & Air Compressor" from Maplin, and is almost identical to the one from Halfords: http://www.maplin.co.uk/Module.aspx?ModuleNo=49038&FAQS=Y&doy=2m9 http://makeashorterlink.com/?J10B21DAD (see the enlarged image) So, you might as well pop down to your local Maplin/Halfords and take a close look at its specifications and the mains adapter. If you need to buy the adapter, unfortunately Maplin don't sell this accessory separately (as in their answer to someone who also lost the charger and posted a similar question like yours in the Q&A!) Isn't it amazing the price differential? -- Lin Chung. [Replace "the Water Margin" with "ntlworld" for e-mail].
From: Goff Deegle on 2 Sep 2006 06:47 On Sat, 02 Sep 2006 08:43:31 +0100, "Dave Plowman (News)" <dave(a)davenoise.co.uk> wrote: >In article <93thf29vf684krn4ofke5690b2evb6qg0o(a)4ax.com>, > Goff Deegle <deegel(a)gmail.com> wrote: >> BTW be sure to charge it regularly. It appears these batteries don't >> last as long as car batteries. > >It should certainly be charged before storage if well discharged. But >shouldn't need routine charging - SLA batteries have a very low self >discharge rate. The one I have suggests a full charging at least once every six months.
From: Goff Deegle on 2 Sep 2006 06:47 On Sat, 02 Sep 2006 08:43:31 +0100, "Dave Plowman (News)" <dave(a)davenoise.co.uk> wrote: >In article <93thf29vf684krn4ofke5690b2evb6qg0o(a)4ax.com>, > Goff Deegle <deegel(a)gmail.com> wrote: >> BTW be sure to charge it regularly. It appears these batteries don't >> last as long as car batteries. > >It should certainly be charged before storage if well discharged. But >shouldn't need routine charging - SLA batteries have a very low self >discharge rate. The one I have suggests a full charging at least once every six months.
From: Chris Bartram on 2 Sep 2006 11:18
PC Paul wrote: > It's unlikely to fully charge it. The nominal 12V of the sealed lead acid > that's 99% sure to be inside it really needs 14V or so to charge it. > > If you try and charge it with a 12V charger you'll find it doesn't last long > at all. > > But then again a lot of cheap chargers are unregulated - which means they > put out a voltage that can vary a lot with load. You'd have to measure it in > that case. > > 13-15V is what I'd look for, ideally 13.8-14.4. > > > I'd imagine a nominal 12v/400ma adaptor will probably give a bit more at low load as the battery nears charge. |