With one refill, you can write hundreds of letters.
Works great oe replacement fast shipping would buy again
Only thing I can fault is the keychain connection. Plastic and not secure enough for me to risk using it and losing it.
Then H1 is my first purchase from this company, but it won’t be my last. First of all, the headlamp itself seems to last forever, it’s also SUPER bright. I also really like being able to plug it in to recharge, not having to swap batteries is a huge convenience bonus. Overall, this is probably one of the best headlamps you can get for the price.