HTC DROID Eris PB00100 - Manual (Page 29)

Phone Basics 29
1.2 Installing the Battery and Storage Card
Always turn off your phone before installing or replacing the battery
and storage card. You also need to remove the back cover before you
can install the battery and storage card.
Note The microSD card is pre-installed in the phone.
To remove the back cover
1. Make sure the phone is turned
off.
2. Hold the device securely with
the front facing down.
3. With your thumb or finger, lift
up the top (from the notch) of
the back cover.
Battery
Your phone comes with a rechargeable Lithium-ion battery and is
designed to use only manufacturer-specified original batteries and
accessories. Battery performance depends on many factors, including
network configuration, signal strength, the temperature of the
environment in which you operate your phone, the features and/or
settings you select and use, items attached to connecting ports, and
your voice, data, and other program usage patterns.