theblur20 Posted April 2, 2021 Share Posted April 2, 2021 Hi all, Noobie question, Looking to replace battery in my ford focus 13 plate (mk3), ive looked on car parts 4 less ect and euro car parts and there a ton of batteries to choose from, i know il need a EFB type as my car has stop start, but other than that any suggestions? Currently thinking of this https://www.carparts4less.co.uk/p/bosch-efb-100-car-battery-3-year-guarantee-444779018 or https://www.carparts4less.co.uk/p/varta-efb-110-car-battery-3-year-guarantee-444779082 Any help be much apreciated. Quote Link to comment Share on other sites More sharing options...
jlawes20389 Posted April 2, 2021 Share Posted April 2, 2021 The Varta one you've linked to I believe will be too long, I'm pretty sure it's 278mm needed for the length. battery megastore is worth a check and also tayna. https://www.batterymegastore.co.uk https://www.tayna.co.uk/tools/battery-wizard I have a Yuasa battery in mine which has given me no issues since fitting around 3 years ago. 1 Quote Link to comment Share on other sites More sharing options...
theblur20 Posted April 7, 2021 Author Share Posted April 7, 2021 On 4/2/2021 at 8:47 PM, jlawes20389 said: The Varta one you've linked to I believe will be too long, I'm pretty sure it's 278mm needed for the length. Battery megastore is worth a check and also tayna. https://www.batterymegastore.co.uk https://www.tayna.co.uk/tools/battery-wizard I have a Yuasa battery in mine which has given me no issues since fitting around 3 years ago. Ah too long then, il go for the bosh one then. One question though, I've read some places you need to memory save car before changing battery? No idea on this as i naively thought you can just swap batteries over.? Quote Link to comment Share on other sites More sharing options...
F0CUE Posted April 7, 2021 Share Posted April 7, 2021 On ford's you can just change it but you will loose radio stations. When the new battery is installed you should go for a drive and it will go through a relearn procedure. 1 Quote Link to comment Share on other sites More sharing options...
theblur20 Posted April 8, 2021 Author Share Posted April 8, 2021 16 hours ago, F0CUE said: On ford's you can just change it but you will loose radio stations. When the new battery is installed you should go for a drive and it will go through a relearn procedure. Thanks for the help 👍. Quote Link to comment Share on other sites More sharing options...
gds1972 Posted April 8, 2021 Share Posted April 8, 2021 Once you have changed the battery you will need to reset the battery monitoring sensor (BMS) so the stop start will work correctly. Quote Link to comment Share on other sites More sharing options...
Marineboy Posted April 9, 2021 Share Posted April 9, 2021 FYI, Varta and Bosch are the same as I understand it and Bosch is just the status brand. I certainly rate Tayna, I've just bout a Varta for my mother in law for about £70 from them, where some places want about £150 for the same battery. It was well packed for delivery, in in a box in its liquid proof bag with a pressure valve stopper. Quote Link to comment Share on other sites More sharing options...
steve67 Posted April 9, 2021 Share Posted April 9, 2021 Here is some information on AGM battery v Your current battery https://batteryworld.varta-automotive.com/en-gb/battery-types-for-automatic-start-stop-systems Quote Link to comment Share on other sites More sharing options...
matt77303 Posted April 9, 2021 Share Posted April 9, 2021 21 hours ago, gds1972 said: Once you have changed the battery you will need to reset the battery monitoring sensor (BMS) so the stop start will work correctly. Not true, well I didn't. I replaced my battery on my my 3.5 focus last week and the stop/start worked straight away. Annoyingly. Matt 1 Quote Link to comment Share on other sites More sharing options...
mjt Posted April 10, 2021 Share Posted April 10, 2021 When I replaced the battery on my Mk3 I did as @JW1982 recommended. I fully charged the new battery and after installation I reset the BMS. The start-stop worked for the first time in over 4 years. Now the "smart" charge system has reduced the SOC to 80% it's stopped working again. I'm not bothered though, it's saving a lot of wear and tear on battery and starter. Quote Link to comment Share on other sites More sharing options...
Andyb1010 Posted April 10, 2021 Share Posted April 10, 2021 On 4/8/2021 at 9:02 PM, gds1972 said: Once you have changed the battery you will need to reset the battery monitoring sensor (BMS) so the stop start will work correctly. Can you tell me how to do this? Thank you Quote Link to comment Share on other sites More sharing options...
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