Speak EV - Electric Car Forums banner

1 - 8 of 8 Posts

·
Registered
Joined
·
739 Posts
Discussion Starter #1
Recently the car has been giving a low battery alert for the key fob. It's been a while since it's changed so didn't think much of it. When I opened up the key fob to change the battery, I did a quick test with my battery tester and it shows it at extremely good charge level. I know the battery tester is good as I've used it with all kinds of batteries over the years (including coin batteries) and it's been very accurate.

Anyone else had the car mis-reporting the fob battery strength despite the battery being good?
 

·
Registered
Joined
·
739 Posts
Discussion Starter #3
No, I tried the spare key and the battery was completely dead in that (didn't work with the car and the battery tester reported the battery dead). I put a new battery in the spare fob (which was the last spare battery I had). So I'm currently using the spare fob and the normal fob still has the same battery in it. I've ordered a pack of new coin batteries but I thought I'd post in the mean time.
 

·
Registered
Joined
·
3,063 Posts
If there is a fault it sounds like it is in the combination of the first key and its battery. My money is on the battery.
 

·
Moderator
Joined
·
879 Posts
I've found the key fob very fussy about battery voltage, it likes to be 3V or more.
Depending on how long your pack of 10 button cells for 99p have sat on a shelf, you may be changing them pretty frequently. I know I have!
 

·
Registered
Joined
·
6,598 Posts
No, I tried the spare key and the battery was completely dead in that (didn't work with the car and the battery tester reported the battery dead). I put a new battery in the spare fob (which was the last spare battery I had). So I'm currently using the spare fob and the normal fob still has the same battery in it. I've ordered a pack of new coin batteries but I thought I'd post in the mean time.
As an extra experiment whilst waiting for the post to bring supplies try putting the battery from the spare fob ( that has proven to be OK ) into the normal fob to rule out any fault with that fob rather than the old battery that tested OK.
 

·
Registered
Joined
·
109 Posts
Get a new, branded battery. You can't just go on the voltage. I tried using pound shop batteries and it wouldn't have it at all - even though they reported the right voltage to my voltmeter.
 

·
Registered
Joined
·
739 Posts
Discussion Starter #8
All sorted now. I can only assume that the threshold low battery warning for the key fob is pretty high. The used battery would probably be adequate for some other low powered device such as a watch, kitchen weighing scales etc but I have nothing else that takes the CR 2025 battery so a little bit of a shame. Both key fobs have a new battery in them and the low battery warning is gone. Thanks for the replies :-D
 
1 - 8 of 8 Posts
Top