chrisfpv

use sd card formatter v5 its free software to format your sd card then it will work i had the same problem when using sd card in the speedybee fc

SD Memory Card Formatter for Windows Download - SD Association

Li Ion has a Range between FULL 4.2V (sometimes 4.1V) and EMPTY 2.5 V.

If you use this Range, you can exept the full Load of Capacity.

If you land on 3.5V/Cell, you will NOT have the full Load out of your Pack.

i`ll prefer to land on 3V/Cell with my 21700 4S1P 4500mAh Packs.

3.2 to 3.5 or 6.4 or 7.0 land at 3.0 to 3.2 it will come up a little bit win it sets a mins. buy .2 to .7 and it will be safe

LiIon cells typically can go much lower than Lipos/3.5V

if I understand correctly your not getting the voltage displayed in the OSD correctly???

if that is the problem go to the battery section in Betaflight and calibrate the battery voltage both Voltage and Mah can be tuned there

build FT5 T-Motor Frame Freestyle birth name ," The sky blazer " :)

Frame T-motor FT5 MK2 Freestyle

Esc T-Motor F55A Pro2 bl32 4in1 6s

Fc T-Motor F7 PRO Full Function

Motor T-Motor Velox 2307 V2 1950kv

Cam Runcam phoenix2 Joshua bardwell edition

Vtx Rush Ultimate V2

Rx Elrs Rp1

Build number ,, Hmmmm .. 😅

Frame flyfish rc volador v1 Freestyle.

Esc rush blade Extreme 60A

Fc Aikon F7

Motors T-Motor Velox 2306 v3 1750kv

Cam Runcam Phoenix2 joshua bardwel edition

Vtx Speedybee TX800

Rx Elrs Rp1

my latest build ,

Frame Tmotor ft5 MkII Freestyle

Motors , Meps Space 2207 1950kv

ESC Speedybee BL-32 50A

FC Tmotor F7

Cam Runcam phoenix joshua bardwell edition

Vtx RUSH tank Ultimate

rx elrs diversity rp3

thx my friend for making this webpage and doing all you do for this comunity :)