Canon EOS 20D - Manual (Page 154)

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Major Accessories (Optional)
Battery Pack BP-511A
High-capacity, lithium-ion, secondary power pack.
AC Adapter Kit ACK-E2
Power source kit (AC adapter, DC coupler, power cord)
for supplying power to the camera with a household
power outlet. Compatible with AC 100 - 240 V.
Compact Power Adapter CA-PS400
Quick charger for BP-511A. It takes about 110 minutes to
recharge one pack. Two packs can be attached to it at
one time. DC Coupler DR-400 (optional) can also be
connected to the CA-PS400. Compatible with AC 100 -
240 V.
Battery Grip BG-E2
This accommodates two BP-511A packs or six size-AA
batteries. It has a vertical-grip shutter button, electronic
dial, AE lock/FE lock button, and AF point selection
button.
Semi-Hard Case EH17-L
Dedicated case to protect the camera.
It can accommodate the camera attached with the EF-
S17-85mm f/4-5.6 IS USM lens (optional).
Shoe-mount Speedlites
An EX-series Speedlite can be attached to the camera’s
hot shoe. In the same way as normal exposures, you can
use E-TTL II autoflash for flash exposures.