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Uni-T UT181A pictures
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billtodd:
Sorry to dig up an old thread (blame Joe Q Smith :-))

This is my solution to the 181 battery life problem :

I've added a cheap wireless charging module in the battery compartment (no mods other than cutting the battery wires) .

The module (from ebay) originally output 5v but was adjusted to give 7.something volts through a schottky diode .

Positioning is critical to get the 7+ volts (enough to top-up, without overcharging, the battery)  .

A 3d printed carrier holds the transmitter on the outside with magnets attracted to the compartment screw heads.

Bill

joeqsmith:
That's an interesting way to work around it.  How long are you logging for that battery life became such a problem?    When new, I was getting about 40 hours.  Now after a few years, the battery included with my meter is starting to drain much faster.   

Fluke offered a battery pack for their 189 which replaced the stock back cover.  This allows you to use Cs in place of the AAs.   I have a friend that has one and I don't think they have changed the batteries yet.  Its so thick that the meter stands up on the battery pack.    I use all rechargeable and have multiple sets that I rotate through.   We don't have that luxury with our 181As.   I would buy an extended kit similar as Fluke offered for the 181A if it were offered. 

Thanks for the post.   
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