Jetbeam issues 2016 New Upgraded Bright LED Flashlight Models BC20-S / BC25-S with Micro USB Charge Port.
Above parameters in amazon.com applies to rescuing and searching purpose:
IPX-8 Waterproof (submersible up to 2 meters), Max output of 960 lumens, Powered by 2*CR123(RCR123) or 1*18650 batteries, Made of durable aircraft-grade aluminum, Premium Type III hard-anodized anti-abrasive finish, Impact-resistant accords with US MIL-STD-810F (1.5 meters) ; I noticed 2 advantages: Long beam distance: 300meters and 3 hours / high light level long battery life. These 2 parameters are better than many other models in the market in the price grade (most other models are200meter and 1hour and 30 min as maximum).
Then how about its upgraded model BC25-S?, the new models BC25-S/BC20-S remain all the advantages of BC25-SE above, such as long beam distance and long battery life in high light mode, but it upgrades a HIDDEN MICRO USB (you need to screw off the head to use the USB charging port) port for rapid charging and better LED, also this hidden USB port will provide better waterproof efficiency than many pure DUST CAP.
But be careful, please don’t use CRC123(16340) battery for these upgraded models BC25-SE/BC20-SE, the previous model BC25-SE could use RCR123 (16340) battery, but newer models BC25-S/BC20-SE shall not use CRC123 battery because of the USB charging Voltage is different than BC25-SE, if you use CRC123 battery for BC25-S/BC20-S model, it may damage its circles when insert USB cable to charge.
What are the differences between these 2 models? (BC25S and BC20S)
The only difference is BC25S got bigger head to refect longer distance beam around 300 meters (as below picture), other parameters are the same such both of them have tatical tailcap switch.