![Amazon.com: XTAR X4 Extended Version Protected 21700 20700 Battery Charger LCD Display AC Input Port 18650 Charger 2A Fast Charger with Mirco USB Output for Rechargeable 3.6V 3.7V Li-ion 1.2V Ni-MH Ni-CD Amazon.com: XTAR X4 Extended Version Protected 21700 20700 Battery Charger LCD Display AC Input Port 18650 Charger 2A Fast Charger with Mirco USB Output for Rechargeable 3.6V 3.7V Li-ion 1.2V Ni-MH Ni-CD](https://m.media-amazon.com/images/I/617KM7Y0b6L._AC_UF894,1000_QL80_.jpg)
Amazon.com: XTAR X4 Extended Version Protected 21700 20700 Battery Charger LCD Display AC Input Port 18650 Charger 2A Fast Charger with Mirco USB Output for Rechargeable 3.6V 3.7V Li-ion 1.2V Ni-MH Ni-CD
![Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C](https://m.media-amazon.com/images/S/aplus-media-library-service-media/5dbbb05d-9d15-402d-a9af-4b156ecfe5f9.__CR0,0,220,220_PT0_SX220_V1___.jpg)
Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C
![My XTAR X4 Extended is able to charge an Olight 18650 (not too surprised). However, it is somehow also able to charge the Olight 21700 despite the plastic ring around the positive My XTAR X4 Extended is able to charge an Olight 18650 (not too surprised). However, it is somehow also able to charge the Olight 21700 despite the plastic ring around the positive](https://preview.redd.it/numd71utv5o71.jpg?width=640&crop=smart&auto=webp&s=187455d3878be0e245a55baaf3cb13355c89e9fe)
My XTAR X4 Extended is able to charge an Olight 18650 (not too surprised). However, it is somehow also able to charge the Olight 21700 despite the plastic ring around the positive
![Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C](https://m.media-amazon.com/images/I/510toKjKfeL._AC_UF894,1000_QL80_.jpg)
Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C
![Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C Amazon.com: XTAR X4 2A Fast AC Power Battery Charger 2 Input Ports with USB Output Function for 3.6V 3.7V 14500 16340 18650 20700 21700 26650 1.2V AAAA AA A SC C](https://m.media-amazon.com/images/I/61XehI2AkQL._AC_UF894,1000_QL80_.jpg)