Products > Test Equipment
Rechargeable 9V batterries for DMM or Alkaline only?
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JenniferG:
Thanks for all the replies.  Looks like the UT61EA can handle the rechargeables fine. I'll get the 7 cell instead of 6 cell.

With all the data logging I am doing I think the rechargeable perhaps makes sense.  The 9V battery 2 days ago read 9.7V and now it is at 9.2V.   But I've been running a lot of data logging tests since I wrote my own C++ class to read from it on my Arduino Mini Mega.
james_s:
Rechargeable batteries make sense for almost everything. They're not expensive anymore, they don't rapidly self discharge anymore, and they are much less likely to leak.
iMo:
I've been using rechargeable 9V battery (NiMH) in my Metex handheld. Mounted a 2.5mm jack socket near the battery bay, and wired a diode and a resistor for external charging. While meter on the desk the battery is trickle charged..
james_s:

--- Quote from: imo on November 24, 2022, 08:15:42 am ---I've been using rechargeable 9V battery (NiMH) in my Metex handheld. Mounted a 2.5mm jack socket near the battery bay, and wired a diode and a resistor for external charging. While meter on the desk the battery is trickle charged..

--- End quote ---

Generally speaking I'd say this is a bad idea, it compromises the safety of the meter and invalidates any CAT rating that it has. The battery compartment is part of the safety isolation of most meters.
iMo:

--- Quote from: james_s on November 24, 2022, 08:17:14 am ---
--- Quote from: imo on November 24, 2022, 08:15:42 am ---I've been using rechargeable 9V battery (NiMH) in my Metex handheld. Mounted a 2.5mm jack socket near the battery bay, and wired a diode and a resistor for external charging. While meter on the desk the battery is trickle charged..

--- End quote ---

Generally speaking I'd say this is a bad idea, it compromises the safety of the meter and invalidates any CAT rating that it has. The battery compartment is part of the safety isolation of most meters.

--- End quote ---

"While meter on the desk and not in use the battery is trickle charged.."
And you may create an isolation cover (3D print) for the small 2.5mm socket..

PS: is there a handheld dmm with wireless inductive charger available??
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