Life expectancy of a battery of this type is measured in number of complete charge cycles before "end of life" or actual capacity versus original rated capacity in percentages. For instance, the battery in this phone is rated for 300-500 cycles where "end of life" is when the battery will only hold 80% of its original rated capacity, and where a cycle is the cumulative value of one full charge and then the same amount drained - or in other words it could be 2 - 50% charges each followed by the same amount discharged, or 3 - 33% charges or 4 -25% charges, etc. Whatever the number of cycles, it would still be considered "end of life" if it can no longer hold more than 80% of original rated capacity.
Some manufacturers will deliberately limit the charge to less than 100% even though the meter may measure it as 100%, because charging to capacity actually shortens the battery's life (number of cycles). By limiting the charge to let's say 85% of capacity, it may actually give you 700-1000 cycles instead before the battery will only hold 80% of original rated capacity.
Also, some manufacturers may consider 70% of original capacity or less as end of life, rather than 80%. It used to be considered that 50% of original capacity was end of life for rechargeable batteries when used in applications such as cameras or other devices, but that causes far too much complaints from phone users so the phone industry went to higher powered batteries and lower charge maximums to extend life and give longer run times.
Thank you! Interesting info and makes sense to me.
Likely in the range of $100 or so, possibly more since it's a bit involved.
Not what I consider inexpensive.
A good technician could accomplish a full replacement in 10 minutes or less.
Most definitely a mail-in repair.
This concerns me most. If using this phone for business,, to mail in is prohibitive, and precludes purchase.
One awesome phone, battery life out the whazoo, you're gonna love it!
Probably would enjoy,, and the Razr sounds nearly tough enough, light enough, somewhat bulky but no more so than most large screen phones, nice batt life, water resistant but,, but to have to send out for batt replacement is a no go,,,,,,,,, I need a phone 24-7 for business.