Please don’t make that same mistake as the Keon,
The battery pack in the Keon is a 4 lithium cell pack with slim protection board (14.4v-16.8v 700mA pack) being charged with only 5v with an internal dc-dc boost. The Keon is slow to charge and the battery runs out if you enjoy long sessions.
Myself and other users have hard modded their Keons by removing the underwhelming battery in place of an external 16V 5A dc power supply.
TLDR: Keon battery sucks - Please for the SLR toy have a large battery or a means to power it externally.