RocFly Size AA 2pcs/pkt Batteries default has a Mini USB head which can be use for charging Samsung phones. Now comes with FreeGifts of other Head Adapters.  1) iphone Charger Head Adapter 2) Type C Charger Head Adapter Purchase while stock last!

Sorbo 4 pcs Set
Now comes with FreeGift  
(Purchase while stock last)

Now if you purchase Sorbo 4 pcs of batteries (AA and AAA size), it will comes with a freegift as illustrated like the photos below.
To understand Sorbo batteries, please click HERE

4pcs Set Sobro AAA Batteries  comes with a Plastic Casing and Charging Cable	4pcs Set Sobro AA Batteries comes with a Plastic Casing and Charging Port