My Laser Pointer always fails?

For this problem, we can check three factors to fix this problem.
1. Check the battery
The laser pointer will be always off and its beam weak if it is low powered. At this time, we need to charge it.
Please take out its battery, charge the battery with this charger and this micro- USB cable provided together with the laser pointer.
A light on the charger comes on red when the battery is being charged, and turns green when the battery is fully charged.
2. Check if the part with a warning label is loose or not. If yes, screw it tightly.
3. Check the spring inside the laser pointer. 
Please take out the battery, check the spring which holds the battery is bent or not. If the spring is bent, you can try to straighten it by using a small wrench or other tools.
If you have checked all the methods above but they don't work, please contact: