User's Manual

Flex 4ES/EX Instruction Manual
September 2016
Page 34 of 37
6.5. 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.