Please ... What is this?

Without great to lose the same negative words - I agree with the comments of the disappointed buyer to.
This battery pack is recommended by no means !!! (When operating near the Oregon 600).
Adventurous long loading times, for minimal duration. After 2 hours in the middle of "vegetables" I had to change for the first time; under suspicion of having perhaps caught a faulty pack. The 2nd then held adrenalinversprühende three hours ...
Question 1 on GARMIN: What is this ... please ????
And Question 2 - this small rubber plug in the battery compartment: Please ... What is this ????
Is this a gimmick, which avoids that you use "foreign" batteries? Thus GARMIN another kl. Achieved perquisite when buying a battery pack? Oh crap! To replace a smart buyer will take it with a second ...

The previous comments have the note while standing in there too, but I would be remiss not to ask the question 3, in view of the lovingly designed and purely dedicated presentation of the battery pack:
There is no external battery charger. So GARMIN: WHAT is this ... PLEASE ????
Conclusion:
I gave both packs back, get my money back and it bought Eneloops including external charger.
The fetzt more fetzt better, lasts longer, shorter loads, and the set of 4 has even a chic Aufbewarhungsbox.