Changing a cellphone's battery won't erase its internal or expanded memory. Once data and files are placed onto a cellphone's memory, they remain there until you delete them or the device experiences an uncommon extreme condition, such as water exposure or an electrical surge.
Memory
Most mobile phones come with a limited amount of pre-installed memory, which makes it necessary to add memory if you intend to add a lot of content, such as music and pictures, to the devices. Mobile phones provide this option through internal card slots that typically support microSD or microSDHC memory cards for up to 32GB of expanded memory. Each of these types of memory is designed to retain its contents, even during periods when no power is available, such as during a battery change.
Battery
As of November 2011, most mobile phones use standard lithium-ion or lithium-polymer batteries, which are designed to provide mobile devices with extended battery life. Usually, these batteries are located inside the phone's back cover, in front of the device's subscriber identification module card, better known as the SIM card, and expanded memory card slot. Over time, these batteries lose their ability to retain power, providing your phone with shorter amounts of time before needing to be recharged. Eventually, you'll need to change the battery, which can be done in less than a minute and poses no threat to losing the phone's memory during this short period of time.
Options
If you're worried about losing your cellphone's memory contents while changing a battery, you can transfer all of the device's internal memory contents to its microSD or microSDHC card for backup purposes. These cards are designed specifically to retain and transfer data for long periods of time without power. Using the phone's USB feature to connect to a personal computer will enable you to synchronize and transfer files between the machines, enabling the PC to act as a backup should any of the phone's memory be lost during a battery change.
Consideration
Although your cellphone's memory won't be lost while its battery is changed, it's best to get into the habit of backing up the device's memory in the event of extreme occurrences, such as excessive phone damage. In addition to backup memory cards and synching with a PC, you can transfer your device's memory contents from one device to another through Bluetooth technology, which wirelessly transmits data to any device that's equipped with the same technology.
Tags: cellphone memory, expanded memory, memory contents, battery change, device memory
