Apart from the colour this is a perfect way to power my HP21. It fits exactly, and snaps into place with confidence. I use regular AA alkaline batteries without problems, : no need to charge anymore. The remark below about flat-top batteries is not correct: because of the long springs regular batteries fit in easily.
I don't. de David Campbell el 19/09/2020
Unfortunately I have not yet received this product so I am unable to rate it.
Nice made de Anónimo el 11/06/2020
Fits well in my HP21. Easy to use.
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