Test/review of Energizer 9V recharge 175mA NH22-175 (Silver-black)

Batteries and Chargers Rechargeable Batteries
1

Energizer 9V recharge 175mA NH22-175 (Silver-black)







Official specifications:

  • Chemical system: Nickel-Metal Hydride (NiMH)

  • Nominal voltage: 8.4V

  • Rated capacity: 175mAh at 21°C (0.2C/35mA discharge)

  • Typical weight: 42.0g

  • Jacket: Plastic

  • Operating temperature: Charge 0°C ~ 40°C, Discharge: 0°C ~ 50°C

  • Storage temperature: –20°C ~ 30°C




A 9V NiMH battery from Energizer, it is rated with fairly lowe capacity.












There is some difference between the two batteries, the variation with capacity is fairly normal for NiMH.










Conclusion

These batteries have a bit low capacity for 9V NiMH batteries, and the matching is not perfect.
I.e. not perfect batteries, but they are not bad either.



Notes and links

How is the test done and how to read the charts
Compare to other 9V batteries: Alkaline/NiMH/Lithium/other
2

Thanks for the review.
These 9v batteries are useful for my lux meter. Luckily i have a charger for them though.

3

I have these batteries in my smoke alarm.

Should the fully charged voltage be 9.8v?

4

That sound reasonable, it is seven NiHM cells and they are about 1.4V each fully charged.
Note NiMH cells do not have a specific fully charged voltage, there are some tolerance.

5

Not to complain about the review. That is excellent as always.
OTOH, people using the NiMh 9v, might think about checking out the Li-on 9v (8.4v/2S). They are WAY WAY better. I thought the NiMh 9v were a sad excuse for a battery. Poor capacity, and lousy retention.

6

For things that I own that use 9v batteries, I’m always torn between the lithium ion batteries (which are a bit expensive) or the LSD NiMH (which I only found in tenergy centura form).

Mainly use them to power fluke multimeters, forehead thermometer, stud finders, wireless mics

These regular NiMH seem to always be dead when I need them from self discharge

7

Exactly!