ATTENTION EDIKETTENSCHWINDEL !!!

These batteries will never reach again 4000 mAh !! Unfortunately, the gild now for almost all batteries UltraFire !!!
I have the battery tested with my Navi. In the battery box 4 batteries of this type have been.

Test conditions:
- Navi komplet teaching hazards
- Bateriebox connected

The battery box must both the Navi supply in these circumstances as well as the internal load Naviakku.
I let the navi then run until the battery box was empty and turned off the protection circuit.

The runtime with this and also with the Black batteries this manufacturer was 10 hours and 15 or 20 minutes !!!

I still have a Pack 2600 mAh 18650 rechargeable batteries from a different manufacturer, mind you 2600 mAh !!!!
Same test setup identical conditions (Navi previously made teaching) with these battery runs the navi now 12 hours without interruption and the battery box is still 2 LED on what a residual charge between 35 and 60% !!
I'll be here how many hours are filled in later total of came out. But the 2600 mAh have overtaken these alleged 4000 mAh already by 2 hours !!!!! So stay away from the 4000 mAh battery of this manufacturer, the data on capacity have been at least doubled if not tripled, and not in accordance with the real capacity.