Philip Posted November 30, 2014 Share Posted November 30, 2014 I am about to replace my 12v Bosch Silver 6F 66Ah battery in a 911SC 1980 Targa. Would the Bosch S4 (72Ah and 680 cold cranking) be a good choice? Or would an S3 (70Ah and 640 cold cranking) be enough? Any other better recommendations? Link to comment Share on other sites More sharing options...
spudulike Posted November 30, 2014 Share Posted November 30, 2014 I fitted an s5 battery. It cost £60 from batteries by post or something similar, way cheaper than Halfords. Link to comment Share on other sites More sharing options...
Type911 Posted December 1, 2014 Share Posted December 1, 2014 JCB are the cheapest in my experience (Just Car Batteries, not the yellow diggers) Link to comment Share on other sites More sharing options...
Wingnonut Posted December 1, 2014 Share Posted December 1, 2014 I got an S5 from ECP on some deal at the time. It made no sense to go for the S4 or S3 as it was a minimal price difference. Link to comment Share on other sites More sharing options...
Beaky Posted December 1, 2014 Share Posted December 1, 2014 Is this not an opportunity to get a light weigh battery, is it something like a Braid one? Link to comment Share on other sites More sharing options...
Beaky Posted December 1, 2014 Share Posted December 1, 2014 I little research and the lightweight makes are Odyssey or Braille Link to comment Share on other sites More sharing options...
topcarrera Posted December 2, 2014 Share Posted December 2, 2014 JCB are the cheapest in my experience (Just Car Batteries, not the yellow diggers) Thanks for the lead - great prices! Just bought a Varta Silver Dynamic 77AH / 780 CCA - £68.75 delivered. Link to comment Share on other sites More sharing options...
spudulike Posted December 3, 2014 Share Posted December 3, 2014 Yes that was it Just car batteries. I have bought a few from them, very good value Link to comment Share on other sites More sharing options...
topcarrera Posted December 4, 2014 Share Posted December 4, 2014 Thanks for the lead - great prices! Just bought a Varta Silver Dynamic 77AH / 780 CCA - £68.75 delivered. Arrived today, free delivery, 48 hours after online purchase - mega packaging. Recommend Link to comment Share on other sites More sharing options...
SP72 Posted December 4, 2014 Share Posted December 4, 2014 Tayna.co.uk are competitive too maybe a quid or so more expensive than jcb for TCs example but with 24 HR delivery. Also very much recommended. Link to comment Share on other sites More sharing options...
Philip Posted January 28, 2015 Author Share Posted January 28, 2015 Many thanks for all the help/advice. I have finally got round to ordering a Bosch S5 from JCB. Its a bit of an 'upgrade' from my old Bosch discontinued battery and they extra cold cranking will be welcome I suppose. Thanks again and apologies for not coming back to this thread for 6 weeks!! Link to comment Share on other sites More sharing options...
Nige Posted March 3, 2016 Share Posted March 3, 2016 Thanks for the lead - great prices! Just bought a Varta Silver Dynamic 77AH / 780 CCA - £68.75 delivered. Just dragging this up as I needed a new battery so order the above Varta unit from JCB. Still £68.75, ordered Sunday and arrived yesterday so spot on. Unwrapped it this morning to install and found I have been sent a Bosch Silver S5, so I am guessing they are both basically the same as they are under the same ownership. Oddly the Bosch unit is an extra £10 according to the JCB website and looks identical apart from the branding, I didn't get charged anymore. So if you want a Bosch Silver S5 order the Varta version and you might get lucky. http://www.justcarbatteries.co.uk/catalogsearch/result/?q=e44 Link to comment Share on other sites More sharing options...
SP72 Posted March 3, 2016 Share Posted March 3, 2016 Tis cheap indeed - I'll investigate their AGM options as mine discharges after 14d or so with alarm armed (no power in lockup). AGM can handle discharge/recharge much better than lead acid - mine still strong after 8 years and being flattened (<5v) at least 10-15 times Link to comment Share on other sites More sharing options...
Nige Posted March 3, 2016 Share Posted March 3, 2016 Yup, the battery that it's replaced ( Bosch Silver 66AH) was in the car when I bought it nearly 10 years ago. In that time it's been flattened multiple times, overcharged, shorted and generally abused. I think it's lasted rather well all things considering. Hope it's replacement can take the same amount of abuse. Though I think I'll invest in a CTEK conditioner. Link to comment Share on other sites More sharing options...
R2D2 Posted March 3, 2016 Share Posted March 3, 2016 Nige, by "general abuse" i do hope that you are not still "accidentally" shorting the terminals across various parts of your own person? This will void the warranty I suspect. Link to comment Share on other sites More sharing options...
johndglynn Posted March 4, 2016 Share Posted March 4, 2016 OK slightly different electrical loads and duty cycles but I have to say the old adage about Porsches preferring Bosch batteries has been proved on the Cayenne with a lesser battery dying after 18 months and a new S5 transforming the cold starts. If you're staying big then I think stay Bosch - Euro Car Parts are well priced via their eBay store and most of us are close to a branch. I paid £80 for the Cayenne battery. Link to comment Share on other sites More sharing options...
suckho Posted March 7, 2016 Share Posted March 7, 2016 I bought Bosch S6 (S6008/S5A080, AGM, 70Ah, 760A) battery last spring for my 911SC 1982. Not cheap, but these AGM batteries never leak and ruin your front trunk. Fits and works perfectly! Link to comment Share on other sites More sharing options...
Dyaque Posted September 16 Share Posted September 16 Good morning all. "Dragging up this thread" (as Nige did earlier) for the same reason: mine's died and needs replacement ('83 SC). There is much interesting discussion elsewhere on the forum about lightweight batteries, lithium, batteries from motorised wheelchairs (I enjoyed that), etc, but I have not (yet) found a thread that brings it all together. So I was wondering whether the advice above still stands all these years later? Is Bosch still the one to have, and the S4 a minimum? Is the AGM option still going strong and recommended for these cars? My local specialist advised that AGM are designed for stop-start engines so not approrpriate, but there seem plenty of users both here and on Pelican Parts. Any opinions on this? Have the lighter-weight options become better/defined? Basically, I could do a straight swap but am wondering whether there is a neat upgrade (mostly but not only thinking of weight) to be had without risk or huge cost? Thanks in advance. Jack Link to comment Share on other sites More sharing options...
Nige Posted September 16 Share Posted September 16 I still have the same battery that I installed in 2016, it still gets used and abused across my nipples. I rarely put it on any conditioning charge, just gets left as is over winter. 1 Link to comment Share on other sites More sharing options...
Phill Posted September 16 Share Posted September 16 AGM batteries have been around since before stop start so that’s a load of bunkum. Nearly all batteries are guaranteed for three years now so I just go for the right size at the best price, which normally works out as Halfords. It’s a consumable item, look after it and it will last years. Link to comment Share on other sites More sharing options...
mean in green Posted September 16 Share Posted September 16 The novelty of a lightweight golf cart battery wore a bit thin for me, as I found the only way I could be sure it would still start when I needed it to was to disconnect it every single time. Link to comment Share on other sites More sharing options...
Chris T Posted September 16 Share Posted September 16 If you are a member, buy a Bosch battery from Costco, 5 year no-quibble guarantee. Take it back for a new one every 4 years 11 months! I too have given up on the super-light golf cart battery. However 12v lead acid batterys come in all sizes, for both my cars I have chosen a small sized version with the correct terminals. CCA is more than enough, absolute Ah capacity immaterial in my case. Link to comment Share on other sites More sharing options...
Ian Comerford Posted September 16 Share Posted September 16 Bosch batteries are not as good as they used to be so if I was in the market now and wanted a standard (ie non-lightweight) I would choose either Varta or Yuasa Link to comment Share on other sites More sharing options...
SilverWT Posted September 16 Share Posted September 16 (edited) 1 hour ago, Ian Comerford said: Bosch batteries are not as good as they used to be Very true, Bosch sold on the brand many years ago, same true for Varta. All now made in a generic factory in China. Yuasa are the best batteries these days and they are the manufacturer behind new car fitments (and I suspect Halfords own brand). Search on here for my username and "Yuasa". I have been using one of their "light weight" mobility scooter batteries in my 3.2 for years without problems. I also use a normal size (although smaller than the regular SC boat anchor) Yuasa in the SC. Again, no problems for years. Mark Edited September 16 by SilverWT 1 Link to comment Share on other sites More sharing options...
njpcarrera32 Posted September 17 Share Posted September 17 Another vote for Yuasa. GSF substantially cheaper than Halfords. Link to comment Share on other sites More sharing options...
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