not to scale.
Name.
Length × Diameter.
Contacts:
Raised area Positive.
"Pip" Negative.
(6.75 volts for original Mercury types).
Commonly used in pet collars and power microphones. Replacement for the now discontinued mercury batteries: 5H-C, 5MR44, 5NR44, HM-5C.
Equivalents:
5H-C, 5LR44, 5MR44, 5NR44, 175, 1501, 1501A, 1501M, A175, AL175, E175, EN175, ENA175, EP175, HM5C, MN175, MN175A, MN175B, PC175, PC175A, S175, T175, TR175, TR175A, TR175S,
| Image not to scale. | Common Name. | Dimensions. Length × Diameter. | Chemical Composition. | Nominal Voltage. |
|---|---|---|---|---|
|
| A175. | 27.8 mm × 12.6 mm Contacts: | Alkaline. | 7.5 volts, (6.75 volts for original Mercury types). |
Make Your Own:
With many shops carrying cards of 30 or so alkaline watch batteries for not a lot of cash, making your own is a cheap and viable option.
To do this, simply stack 5 × LR44 (AG13) on top of each other (+ to -) and cover with heat-shrink or tape to hold them together.
You may need to ease the contacts in your device closer together, but this is not usually necessary.
I've seen cards locally for £1 that have 10 AG13 on them so that's 2 A175's for a pound plus lots of other watch batteries to "play about" with!