Perfect "Backup" for my Sony A300!

Every time before the holiday season comes over me worry what would happen if the go on strike the charger. Replacement is hard to come by considering the failed battery forms.
Now I have seen on Amazon this Bundle Star combination, and am very satisfied. Although I only got a fright because the charger are only 2 pins,
but the battery has 3 sockets.
But everything goes according to plan. Both the original batteries and the supplied battery replacement can be properly load.
The replacement battery is actually not a "schwachbrüstiges Billigteil" but has the same capacity as the original.
At 4 supply options
1.) mains - cable included,
2.) automotive power outlet - cable included,
3.) Micro-USB - no cables while one has but mostly from Navi or similar..
4) USB - no cables going (Caution, here you need plug A to plug A)
can really go wrong any more.

Now's may reassured go on vacation.