The histrory of V-228 or T-228 9V Ni-MH / NI-CD Charger 110V 60Hz

[Kiriakos GR]

One decade back, I got from the USA four of 9V Ni-MH batteries these branded as Tenergy.
The batteries were offered with one Plug-In Type Ni-MH/Ni-Cd Battery Charger, two ports 9V Block Model T-228.

Due the fact that this charger is not supporting 240V, I did test it once with step-down transformer, and I just keep it as a spare one.
The charger came with out datasheet, and or carton packaging.

This week I did discover a photograph of retail packaging, and the information's over it this was a blast to me.
Charger technology this is ancient, as it was primarily designed to charge 9V NI-CD 
I never owned any 9V NI-CD, so I was totally unaware that these batteries they are supporting 120 mAh as Max regarding capacity.

Long story in sort, all 9V Ni-MH they support much higher capacity.
But this specific charger, USA import, this only supporting slowest charging rate because it was designed to retain compatibility with NI-CD 120 mAh as Max

If you own such a charger, just be aware that its simply slow by design.
Below are photographs giving you a hint of charging times when using higher capacity Ni-MH.