hiace_drifter Posted October 8, 2021 Share Posted October 8, 2021 When I get into my 14 plate focus I get a message saying the keyfob battery needs replacing ... but I have tested the battery and it is 90%... do i ignore the warning? Change the battery anyway? Thanks! Quote Link to comment Share on other sites More sharing options...
StephenFord Posted October 8, 2021 Share Posted October 8, 2021 26 minutes ago, hiace_drifter said: When I get into my 14 plate focus I get a message saying the keyfob battery needs replacing ... but I have tested the battery and it is 90%... do i ignore the warning? Change the battery anyway? Thanks! When you say, 90%, what is the specific voltage? A fresh out of the box battery will usually read 3.3v, anything less than 2.9v is worth replacing... Quote Link to comment Share on other sites More sharing options...
hiace_drifter Posted October 8, 2021 Author Share Posted October 8, 2021 5 minutes ago, StephenFord said: When you say, 90%, what is the specific voltage? A fresh out of the box battery will usually read 3.3v, anything less than 2.9v is worth replacing... I checked it on a battery tester (shows a digital scale from 0-20 approx). I'll fish out the multi meter and get a bit more scientific! thanks 🙂 Quote Link to comment Share on other sites More sharing options...
Frembrit Posted October 8, 2021 Share Posted October 8, 2021 I would suggest changing the battery, use a decent brand though as cheap batteries don't last very long. Quote Link to comment Share on other sites More sharing options...
isetta Posted October 8, 2021 Share Posted October 8, 2021 I agree with frembrit, had lots of trouble on my wife’s Mazda 2 until I bought Duracell instead of cheap ones. But get from a proper shop. Buying branded makes on eBay etc is a bit of a lottery on fake stuff Quote Link to comment Share on other sites More sharing options...
DaveT70 Posted October 8, 2021 Share Posted October 8, 2021 energizer & panasonic are the best Quote Link to comment Share on other sites More sharing options...
StephenFord Posted October 8, 2021 Share Posted October 8, 2021 2 minutes ago, DaveT70 said: energizer & panasonic are the best Duracell are best, and I'm always right! 🤣🤣🤣 1 Quote Link to comment Share on other sites More sharing options...
Hearsepilot Posted October 8, 2021 Share Posted October 8, 2021 8 hours ago, hiace_drifter said: When I get into my 14 plate focus I get a message saying the keyfob battery needs replacing ... but I have tested the battery and it is 90%... do i ignore the warning? Change the battery anyway? Thanks! That type of battery will read full voltage up to the point it fails, if it reads lower than spec then its expired. 1 Quote Link to comment Share on other sites More sharing options...
isetta Posted October 8, 2021 Share Posted October 8, 2021 I haven’t tried all makes but the Duracell in my wife’s Mazda 2 has lasted about 5 years. It’s just getting iffy now. It’s an annoying size 1620 . No supermarkets / high street shops seem to do that size. Just ordered on eBay but might be fake, will have to wait and see how well it works/lasts Quote Link to comment Share on other sites More sharing options...
StephenFord Posted October 8, 2021 Share Posted October 8, 2021 8 minutes ago, isetta said: I haven’t tried all makes but the Duracell in my wife’s Mazda 2 has lasted about 5 years. It’s just getting iffy now. It’s an annoying size 1620 . No supermarkets / high street shops seem to do that size. May (or may not) interest you to know that the ref number gives much detail. 1st 2 x digits are diameter in mm, and last 2, are the thickness in 1/10 mm. Once you know that you can temporarily bodge a battery if immediate fit not to hand! 1 Quote Link to comment Share on other sites More sharing options...
unofix Posted October 8, 2021 Share Posted October 8, 2021 8 hours ago, StephenFord said: Duracell are best Agreed. Funny thing is my Key Low battery warning has just come up this morning. Will have to call in to Pound Land and get a quality replacment 😂 2 Quote Link to comment Share on other sites More sharing options...
isetta Posted October 8, 2021 Share Posted October 8, 2021 Hi Stephen, yes I was aware of the sizes in the code. Eg if you need a 2032 and you only have a 2016 then it will do the job (but not last as long) . But 1620 is an unusual one, I don’t think there are others of the same diameter. Quote Link to comment Share on other sites More sharing options...
StephenFord Posted October 9, 2021 Share Posted October 9, 2021 9 hours ago, isetta said: Hi Stephen, yes I was aware of the sizes in the code. Eg if you need a 2032 and you only have a 2016 then it will do the job (but not last as long) . But 1620 is an unusual one, I don’t think there are others of the same diameter. It is unusual, though I have 3 x '16's (20, 32, 16) in my battery box, all bought online as you just can't buy then in store any longer... Quote Link to comment Share on other sites More sharing options...
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