Motorola cell phone battery for my Motorola KRZR?

My previous phone was also a Motorola KRZR and i believe, this was the best phone i had, in terms of voice clarity but the worst in terms of battery back up. I faced a similar situation as you are facing, I bought a new battery for the phone, it performed well for a few months but then i had to again face a similar situation. Although, the battery will not cost you too much but i hope you should not left disappointed as i was. Nowadays, there are some good quality Li-ion batteries available in the market which have a long lasting back up, you can shop them online at amazon, ebay, megacapacity or cell phone shop. If this is your first time then i'd suggest you to go for a new battery rather than purchasing a new cell phone because i think it is better to pay $10-30 for a new battery (it'll not cost you more than that) than paying $200-300 for a new handset.