请教有关“battery package”的问题!

Still there was no Polyswitch built in. - NOW build in Polyswitch
2) Also the charging electronic is not built in.
The whole item needs to shut down before the electronic of the battery.
For that you need an additional protection for the Direct Charger, additional to the protection of the built in battery.
Otherwise the battery of the direct charger will be defective after several times of use.