Blinking red light

[43rdRecceReg]

Most TK6.0 series equipped tanks come with a fifteen-page booklet/manual for the transmitter, and control unit. There are lots of useful illustrations, accompanied by intructions. The instructions lose- or perhaps add something (gobbledegook) in translation. Indeed, bits of the text are unintentionally hilarious.
Anyway, re: your red flashing light I found the following on p.08:
" When the remote control detects low voltage, the buzzer sends out drip drops in advance and at the same time the power indicator light WILL BLINK CONTINUOUSLY"...
I think your answer's there.
There's little point in asking what 'drip drops' are... I think we can guess.
They do sound a bit like old-fashioned boiled sweets, though.

[HERMAN BIX]

Could that be low voltage in the TANK battery ?
If so that’s a neat function.
If the transmitter battery is fully charged and it’s not that, then it can only be low tank battery voltage or it’s just getting to the point of being too low to run the tank.
Hope so because that’s a cool inclusion

[Herr Dr. Professor]

Bix, do you recall the HengLong instructions (or was it an advertisement?) that offered "better sex"? That hilarious one came up on the Australian list years ago. If so, it's worth quoting here.

[Jofaur86]

Hello, the flashing LED? maybe a problem, with the AA type batteries, poor quality, bad contact in the battery box? but can also come (of origin) from the electronic part? which indicates the drop in voltage to the Led? of an HS component, but in no way affects the operation of the tank!!!