The batteries in the PP and PP+ are a pain.
They're lead acid and they
are individual cylinders. So if you let them run down for very long, it
Some Portable Plues in the UK were fitted with Panasonic 'block' lead
acid battereis which are even more of a pain!. I believe they were
available recently, but the minimum order was 1000 units or sometime
ridiculous.
will ruin them and they're not an easy style to
find. IIRC they're X size
which is slightly larger than standard D size.
The 2.5Ah Cyclon cells are easily available and fit perfectly (my 110 and
Portable Pluese have those in them now). They also can be fitted in the
9114 disk drive battery packs and at least in the UK are a lot easier to
get than the block batteries (RS components and Farnell list them I think).
-tony