[Resolved]  Nokia Bl - 5c 3. 7 V Battery — deshaping of battery

i am using this mobile set more or less 3 years. now i find the back plane of the set become oval shaped. the back cover become very tight to open. after opening with much effort i find the battery(sl no[protected] N433D20404350, made in china) become deshaped. the battery become discharged during conversation. this set was purchased along with another 3 sets & they are used simulteniously in bsnl department. so it is requested to see the said battery whether defective or not & if found faulty it may be replaced by a new one. my address is : joydeep bose, jto/tm/tb, o/o, the sde/tm/tb, telephone bhavan, 5th flr (annex bldg), 34, b.b.d.bag, kolkata-700001. hoping for your earlier response. thanking you.
yours faithfully,
joydeep bose,
cell no.[protected].