Rechargable batteries for DECT cordless phones - is there a problem with getting too high a mAhr rating?

That isnt what you said.

You implied that the charger NEEDED to know the state of charge to WORK.

In fact it does not. It only needs to know it to be able to say how charged they actuially are.

NY presented the following explanation :

I have a set of those and no problems like that - though like yours the original cells were unpredictable, so I soon replaced them with new.

We sometimes find it fails to connect, to charge, when dropped in the cradle - a nudge sorts that.

The way around that is to fully discharge the batteries...

A second phone, maybe wired, for the few hours between empty and charged?

Thomas Prufer

So long as you use batteries with the same chemistry as the originals then there should not be a problem. Phone makers just use the cheapest (ie low capacity) ones that can reasonably get away with.

Some phone chargers are as dumb as a rock and continue to charge already charged batteries eventually killing them (or rather making them unwilling to discharge anything like their full capacity when required).

That is a very bad idea. The *only* batteries I have had leak on me in the recent past have all been genuine Duracell. You can find threads bemoaning the problem in s.e.design. Panasonic or Everyready are still reliable battery brands. Aldi/Lidls were good and at bargain prices in the past - they are less so now and more variable.

Not should *MUST* - likewise if they are NiCad replace with NiCad. NiCads tend to suffer memory effect and so lose capacity quickly.

Several less-fancy chargers measure the charge they have delivered, but aren't controlled by the charge.

I believe it's because they are always on their pedestals being (over) charged that the NiMH rechargeable batts die young. I've just replaced another set in a cordless handset & am not leaving it on the charging stand, only when it needs a charge...

My Siemens Gigaset x4 have all suffered the OPs ailment.