Recent Topics
Volvo Safety - Do You Still Get What You Pay For?
by Best F100
17 minutes 21 seconds ago
Is Quaker State a dying brand?
by Isophix
19 minutes 8 seconds ago
Somewhat amusing Cisco bug
by OVERKILL
19 minutes 23 seconds ago
Slight shift flare when cold
by SilverFusion2010
Today at 06:40 PM
Broken Side Window, 2006 Dodge Grand Caravan
by DeafBrad
Today at 06:36 PM
220v socket installed for car charger
by 14Accent
Today at 06:12 PM
Napa full synthetic 5qt jugs $18.99
by JTK
Today at 04:32 PM
Chemical experts - Can I mix prestone with car soa
by TheMidnightNarwh
Today at 03:58 PM
mismatched appliances
by CincyDavid
Today at 03:54 PM
ATF Flash Points
by thescreensavers
Today at 03:50 PM
on the job drinking
by Donald
Today at 03:44 PM
No more Mobil super at Walmart
by troutfisher
Today at 03:40 PM
Nexen Winguard Sport 2 wins German iF Design Award
by UG_Passat
Today at 02:45 PM
Durable FL exterior paint
by Eddie
Today at 02:42 PM
Improving Work Car's Paint - Bad Clear Coat, Etc.
by Auae85
Today at 02:39 PM
When do they switchover to summer blend fuels?
by Patman
Today at 02:13 PM
EFI Zeros
by AirgunSavant
Today at 02:00 PM
Duratec 33
by AirgunSavant
Today at 01:56 PM
The 3 states of California
by littleant
Today at 01:56 PM
Hand position(s) on steering wheel.....
by ZZman
Today at 01:39 PM
Newest Members
micatx, JamesTheBok, TPD1, macedon, Hever
64841 Registered Users
Who's Online
115 registered (2009Edge, 93cruiser, andyd, Ag76, 14Accent, 15 invisible), 1573 Guests and 32 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
64841 Members
68 Forums
282278 Topics
4712676 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4638920 - 01/18/18 03:18 PM Button Cell Voltage?
maverickfhs Offline


Registered: 12/28/16
Posts: 1764
Loc: VA
So I just replaced a key fob battery(CR1616) on my Civic, since it was working intermittently during brutal cold.

I checked voltage and new cell is showing 3.33V and one which came out is showing 2.96V.

Question is, if it's below 3V then it's almost dead?

I wasn't able to remove that dang screw and rounded it off, but some how hacked it after seeing a youtube video.

thumbsup
_________________________
2006 Civic EX 199K/AT
2006 Acura TSX 177K/AT

Top
#4638948 - 01/18/18 03:53 PM Re: Button Cell Voltage? [Re: maverickfhs]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17213
Loc: PNW
Only data point I have is button cell batteries used in my laser pistol grip. New they measure at 3.33 volts, and the laser barely lights when they get down to 3.17 volts. So yeah, I'd say at 2.96 volts they are pretty much wasted regardless of what they are in.
_________________________
We Don't Need No Stinkin' Efficiency!

Top
#4639016 - 01/18/18 05:02 PM Re: Button Cell Voltage? [Re: maverickfhs]
Wolf359 Offline


Registered: 04/27/12
Posts: 4491
Loc: MA
The ones I get, 2025's have 3.35v when new. My keyless go starts to complain about a weak battery when it hits 3.06 so I end up putting new ones in when it hits that. So I guess 2.96 is dead.

Top
#4639056 - 01/18/18 05:40 PM Re: Button Cell Voltage? [Re: maverickfhs]
eljefino Offline


Registered: 06/15/03
Posts: 32383
Loc: ME
The rating is a nominal voltage. You may find they dip down to 3.0V when any sort of load is on them.

Top
#4639170 - 01/18/18 07:02 PM Re: Button Cell Voltage? [Re: eljefino]
Brad_C Offline


Registered: 07/27/12
Posts: 605
Loc: Perth, Western Australia
Originally Posted By: eljefino
The rating is a nominal voltage. You may find they dip down to 3.0V when any sort of load is on them.


Yes, but a newish cell with an open circuit voltage of about 3.3V may dip below 3, a well loved cell with an OCV below 3V will collapse under load.

My rule is if the device is misbehaving and the OCV is below 3.2 I replace them. If I've taken the time to pop the cover and the battery isn't near enough to as-new I might as well replace it.

Top
#4639179 - 01/18/18 07:11 PM Re: Button Cell Voltage? [Re: maverickfhs]
maverickfhs Offline


Registered: 12/28/16
Posts: 1764
Loc: VA
Yes, thanks for the confirmation. Key was acting up during cold weather. Otherwise, it was just fine. I did replace it with a new cell. Let's see how long it'll last.
_________________________
2006 Civic EX 199K/AT
2006 Acura TSX 177K/AT

Top