Need help with cordless phone rechargeable battery replacements. - HotUKDeals
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Need help with cordless phone rechargeable battery replacements.

manzi Avatar
8y, 9m agoPosted 8 years, 9 months ago
I have a BT Synergy 3505 cordless phone that used to have Uniross Nimh rechargeable batteries (700maH) but they had died. So i brought some Uniross rechargeable batteries but they are 1000MaH and after 12 hours of charging they do not work. Why is this? Do I need 700maH batteries instead?

Thx for ur time
manzi Avatar
8y, 9m agoPosted 8 years, 9 months ago
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Comments/page:
#1
maybe it wasnt the batteries failing but the charger?
try cleaning phone/charger/battery contacts with a cotton bud and meths/surgical spirit
#2
Thx for the tip but I have cleaned it all and checked that it works with some older batteries.
#3
nope pretty much same batteries so must have a couple of duff en's in, charge em n put a multimeter on each, mah is just how much they can store vs drain time
#4
Could those new batteries be of different chemistry (i.e. NiMH when your old ones were NiCD)?

Anyway, take a look at possible replacements:
http://www.battery-force.co.uk/finder.html?a=CORDLESS&d=Cordless_Phone&b=BT&m=Synergy_3505

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