cheap Li-ion Charger!
 

want a cheap 3.6 Li-ion charger for your TTTT and you don't want to do much of electronic modifications, and you're afraid of having your house turn into charcoal?.. click here, thing works great!.. i know, because i'm using one now for those expensive li-ion batteries.

and this thing has an auto-shut-off feature, disharge button (though li-ion batteries don't need this feature) and has LED lights that indictates power, charging, discharging etal!..