diff --git a/docs/Battery.md b/docs/Battery.md
index 9555e46b58..5e5822e24c 100644
--- a/docs/Battery.md
+++ b/docs/Battery.md
@@ -158,7 +158,7 @@ The general method is:
 
 Given (a) the reported mAh draw and the (b) mAh charging data, calculate a new `amperage_meter_scale` value as follows:
 ```
-amperage_meter_scale = (charging_data_mAh / reported_draw_mAh) * old_amperage_meter_scale
+amperage_meter_scale = old_amperage_meter_scale * (charging_data_mAh / reported_draw_mAh)
 ```
 For example, assuming:
 + A Cleanflight reported current draw of 1260 mAh
@@ -167,8 +167,8 @@ For example, assuming:
 
 Then the updated `amperage_meter_scale` is:
 ```
-amperage_meter_scale = (charging_data_mAh / reported_draw_mAh) * old_amperage_meter_scale
-                    = (1158 / 1260) * 400
+amperage_meter_scale = old_amperage_meter_scale * (charging_data_mAh / reported_draw_mAh)
+                    = 400 * (1158 / 1260)
                     = 368
 ```