In reply to MM0FMF:
In reply to 2E0YYY:
In these applications, cell life is mainly dependent on the design of
the charging circuit rather than the cells themselves. Assuming the
cells are decent to start with that is.
Decent cells don’t come cheap. Solar garden lights are a classic example.
People buy half a dozen solar garden lights for a fiver and wonder why the cells fail after just one summer. Over the years, I have sold thousands of “decent” AA and AAA replacement cells for garden lamps and in the case of one of my neighbours, they still running after 5 years. Rechargeable cells out of the pound type shops, are ***‘generally’ junk.
When I worked for a DECT baseband hardware/software provider in
2000-2001, the charger was designed to be “none-optimal” so
that cells failed sooner and customers bought new handsets rather than
realising they only needed new batteries.
Initially, many of the cordless phones used those 3.6 Volt, green heat shrinked battery packs and of course, the genuine replacements cost a small fortune. The phones could have been designed to accept a triple A in the first place, but this meant the manufacturers would not be able to make a fortune out of battery replacements. However, along came the Chinese with a direct replacement for many phones, at just a fraction of the price of the branded products and the phone manufacturers party was over. I still have quite a few of them here, but no-one seems to use them much these days, as the majority of phones seem to use AAA and a few use AA.
*** No doubt, someone will be along to tell me how a set of pound shop type batteries has been powering their Yaesu H/H for the last seven years