If you find you have posted in the wrong forum, it is best to ask a moderator to move the thread for you, rather than re-post it where it belongs. I've deleted your first thread about this, so you are clear now and you won't receive duplicated replies.
As to the topic, I hope you aren't considering attempting to recharge CR123A primary cells - I trust you mean RCR123 Li-Ion rechargeables.
In the blurb for that Steripen charger, note that it says it takes 2 days to recharge 2 cells!
Heck, you didn't include the bit that states "2-5 days". Up to 5 days, really?! I can fashion myself a pot from clay, fire it, then use the same fire to boil the water in that amount of time. Now, if you were out for weeks at a time, with spares that you could swap into the Steripen, and into the charger, that would work ok.