User's Manual

Flex 12ES/EX Standard, AB and Tandem Instruction Manual
September 2016
Page 40 of 43
6.8. Changing Batteries
Changing transmitter batteries (“AA” alkaline battery x 2) by unscrewing the battery cover
located on the backside of the transmitter. During battery installation make sure the
batteries are installed correctly, with “+” to “+” charge and “–” to “–” charge. Also make
sure the screw is tightened after battery installation to avoid water, moisture, dirt, grease,
and other liquid penetration.
6.9. Battery Charging
The transmitter is designed to accept any off-the-shelf Ni-MH rechargeable batteries.
When charging both transmitter and individual batteries at the same time the priority
always goes to the transmitter charging. The individual battery charging begins only after
the transmitter charging is completed. Depending on the battery capacity the average
charging time is approximately 2.5 hours from completely drained to fully charged.
Constant red on the LED represents charging in progress, constant green represents
batteries fully charged, and LED off represents no batteries detected. Please do not use
any rechargeable lithium ion batteries as it will damage both the transmitter and the
charging station.