diff --git a/inxi b/inxi
index 28db033..9cee3de 100755
--- a/inxi
+++ b/inxi
@@ -4275,7 +4275,7 @@ get_battery_data()
 				END {
 					# note:voltage_now fluctuates, which will make capacity numbers change a bit
 					# if any of these values failed, the math will be wrong, but no way to fix that
-					if (b_ma == "true" && voltage_now != ""){
+					if (b_ma == "true" && voltage_min_design != ""){
 						if (charge_now != ""){
 							energy_now=charge_now*voltage_now
 						}