I got stuck the other day, battery needed water, and did not have all my tools here.
So I am looking around the house for a hose or whatnot.. and I decide to use ...a pen.. Staples brand.. looks like a bic, lucky no hole on the side..
field strip it into 3 parts, get a cup of water (not distilled unfortunately) Get off the battery caps. Wet end of finger, insert pen into cup, put wet finger over open end of pen body, drain into battery cell hole !.. repeat,.. MANY times, check occaisionally....works pretty good, but slow..
Hey, it works in a pinch..