Convenient access ~ do the batteries recharge?
02-14-2012, 11:09 AM
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As I understand it, without convenient access when the key is actually in the ignition lock the key fob battery is recharged. But from some reading I've done here on the forum it sounds like the battery in the fob for convenient access does not recharge and must be occasionally replaced?
02-14-2012, 12:01 PM
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My Ride: 2008 535i Premium/Sport
According to my manual (2008 535i) - the battery in the FOB with convienence access does NOT recharge. As a matter of fact, I just put brand new batteries in both mine and my wife's remotes last week. Uses the standard CR2032 size (I bought like 25 of them on ebay for $5 - I use these things in all kinds of devices). You can pick up a single at your local retail store for about $5 each, but I figure that even if the ebay ones don't last as long, it is still a much better value.
02-14-2012, 01:46 PM
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First, sorry for the misnomer; I of course meant comfort access.
Second, thanks for the info. Maybe that is why I can only get one fob to keep the satellite radio presets. Maybe that battery is getting low.
Second, thanks for the info. Maybe that is why I can only get one fob to keep the satellite radio presets. Maybe that battery is getting low.
02-14-2012, 01:48 PM
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First, sorry for the misnomer; I of course meant comfort access.
Second, thanks for the info. Maybe that is why I can only get one fob to keep the satellite radio presets. Maybe the other battery is getting low.
Second, thanks for the info. Maybe that is why I can only get one fob to keep the satellite radio presets. Maybe the other battery is getting low.
02-14-2012, 02:36 PM
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My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
I love the disinformation out there, at my LOCAL dealer (not the one I actually deal with regularly) the gal there insisted that you MUST insert the fob regularly to "Charge" it! 
There's yet ANOTHER reason I don't do business with them regularly! 
There's yet ANOTHER reason I don't do business with them regularly!
02-15-2012, 05:14 AM
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Did you get the owner's manual with your car? If not, you can d/l PDF version from the BMW site for free w/o any registration.
02-15-2012, 07:14 AM
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Yes I got the manuals, still going through them learning everything. I read that the non comfort access key fobs recharge but I didn't see anything that stated the comfort access didn't. I saw how to replace the battery and I guess I should have realized that meant they don't recharge. 
02-15-2012, 12:20 PM
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My Ride: 2012 535i X-driveSpace Grey/Black Dakota, Fineline Anthracite Trim; Executive Package (Rear View, Lumbar, Nav, Voice, SIRIUS, HiFi Pro) Technology Package (Hi Beam Assist, Lane Departure, Blind Spot Detection, Surround View) BMW Apps (Apps, Smart Pho
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Unless you are setting the memory or need to 'park' your keys on a trip you never need to take the fob out of your pocket when you have CA. For those members with warranty, the batteries are even covered under the OEM warranty.
02-15-2012, 07:07 PM
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My Ride: 2008 550I,Space Grey,Hud,Cold Weather,M - Sport, matched GP Thunder headlights and Fogs,,Smoked Badges, Night Vision, Heated Seats,Rear Sunshades, Aux Audio, SAT, NAV, Black Grills, Sprint Booster, Dinan Cold Air, Stage 2 Dinan Software.....More to come soon
This is a "Fact" if you have CA your remote battery will not charge if you insert it into the Slot! CA FOB sends TX and RX signal via proximity sensor and for that to operate properly the battery is higher in V rating Vs the FOB without the CA!
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