charger is $hit and will take longer as it charges through the thin "balance lead"
(or a B3 type using a psu)
GENUINE I-Max B6 - there are a lot of clones out there.....
Gen B6 from genuine reliable company is about £20+
you can use an old laptop psu 11v to 18v to power it or a Gen AC B6 - has built in transformer from mains
only other thing is a B6 has banana leads to deans usually so charging small tamiya battery will require adapter
or just replace tamiya on battery/gun to deans if you can solder
basic B3 balance chargers are ok tbh but they do take longer to charge but still ok as they are straight forward to use - just a bit slower to charge
£15+ for B3, hmm I'd say look into B6 and just be done with it if you can
PS - never buy batteries from airsoft shops:
http://www.componentshop.co.uk/11-1v-2600mah-25c-continuous-discharge-cranestock-lipo-battery.html
ahh crap...
b6 - clone
http://www.hobbyking.com/hobbyking/store/__76465__IMAX_B6_DC_Charger_5A_50W_Copy_UK_Warehouse_.html?strSearch=imax%20b6
or about £11 on fleabay
but tbh get genuine as it is accurate and shouldn't overcharge like some clones can:
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=31467
note this is from EU site as UK out of stock of gen B6
but good news EU holds more stock of airsoft batteries
alas some of the 11.1v airsoft batteries are out of stock
but very cheap stuff is block batteries if your gun can take them
- measure battery space carefully but you can get 7.4v for about £7 for 2200mah 25c
or this mofo 11.1v:
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=36162
25c to 30c is plenty even for tweaked guns
yes you can use 40c-60c but be careful
yes you can buy what you proposed for about £50 for charger & battery
but if you can solder and read up a bit - you can get more value for money or lipo for money