Jun 24

Green Batteries – A cautionary tale

Recently – well last year, I bought some of these new batteries, rechargeable yet will retain their charge for about a year if not used… Where as the older Nickel Cadmium ones will go flat in less than 30 days… Perfect! A Green battery that last as long as an ordinary battery… BUT watch out! Here is a cautionary tale……

I’ve just bought a new quad phone system for the home, as the old  phones kept going flat after about 10 mins use… I’ve just realised why the old ones were not working…. Here’s the technical bit: I replaced the batteries in each hand set with these green metal hydride batteries just about a year ago – BUT the phones were old and used Nickel Cadmium..

The charging rate is different between Ni Cads and Metal Hydrides, such that these phones wouldn’t work properly with these new rechargeable batteries…

I had the same problem with my Oral B toothbrushes, we bought a second one a couple of years after the first one… The old one is Ni-Cad the new is MiHi, BOTH LOOK  identical  but don’t put the hydride one on the Ni- Cad base as it doesn’t charge up properly…. In fact it goes flat as if not being charged at all… Looking carefully at the base of the toothbrushes one stated MiHi the older one – nothing…
So green batteries are perfect for recharging externally, and in torches or portable appliances, but beware of their use in rechargeable equipment.