Here's some stills from the vids on the AP site.
There's lots of "opinion" on the AP list but take it straight from the source:
"The Panasonics don't last as long - so in a way they are false economy, but alarmingly a large number of them die catastrophically under load. I have seen many a battery (and it's usually a Panasonic) show 5.8 volts and just drop through the floor when load is applied.
I don't know much about Fuji batteries.
The best I have seen for longevity is Duracell Ultra.
Fujitsu, Energiser and Varta seem pretty good.
Whichever brand you use -the essential point is to ensure a fresh battery is in the slave.
Whether you swap both batteries out when you get a low battery warning or you simply throw away the Master battery, put the Slave in the Master's slot and put a new one in the Slave doesn't really matter - as long as the new battery goes in the Slave each time.
The problems that people see with handsets dying is just simply down to power supply, or rather - lack of it.
best regards
Martin Parker
Managing Director
A P Valves & Ambient Pressure Diving Ltd"
I've used BatteryMaster and got them delivered to a mate in the UK, another mate going over on a visit will be bringing them back for me. Its all a bit messy. Getting them delivered to an address in the north is another option.
If Barrie stocks them then thats probably the best bet.