Average at best. I bought this to use on scout trips…
Source: bought it new
Average at best.
- Filter is clunky
- Battery life
I bought this to use on scout trips to use with group purification. I have never gotten more than 2 liters purified water before I got the frown on the screen for battery being out.
I have read where you have to store the batteries out of the pen when not in use so, I try that next time. The filter is bulky and I use a bandana instead.