Variant: lilygo_tbeam_1w: Set NUM_CELLS_IN_SERIES 2

Signed-off-by: Luis Garcia <git@luigi311.com>

Author: luigi311

variants/lilygo_tbeam_1w/platformio.ini

@@ -32,8 +32,7 @@ build_flags =
   -D LORA_TX_POWER=22
 
   ; Battery - 2S 7.4V LiPo (6.0V min, 8.4V max)
-  -D BATT_MIN_MILLIVOLTS=6000
-  -D BATT_MAX_MILLIVOLTS=8400
+  -D NUM_CELLS_IN_SERIES=2
 
   ; Display - SH1106 OLED at 0x3C
   -D DISPLAY_CLASS=SH1106Display