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-rw-r--r--keyboard/hhkb_rn42/rn42/battery.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/keyboard/hhkb_rn42/rn42/battery.c b/keyboard/hhkb_rn42/rn42/battery.c
index 34aa18446c..7e868c9646 100644
--- a/keyboard/hhkb_rn42/rn42/battery.c
+++ b/keyboard/hhkb_rn42/rn42/battery.c
@@ -92,6 +92,7 @@ uint16_t battery_voltage(void)
volatile uint16_t bat;
ADCSRA |= (1<<ADEN);
+ _delay_ms(1); // wait for charging S/H capacitance
ADCSRA |= (1<<ADSC);
while (ADCSRA & (1<<ADSC)) ;