It’s hard to remember exactly which guitarists got me started. There were so many of them, in a huge range of styles; but four bassists who I think are incredible are Stanley Clarke, John Patitucci, Jaco Pastorius, and Victor Wooten - not in that particular order of preference.
My (down to) four instruments are, Annie (Alvarez AD-CK60 Koa acoustic); Donel (Black Takamine EF381SC Sruce 12-string with Furman pickup installed later; Rose (2005 Feneer Precision Bass, and the oldest - Lya, the ’96 Strat.
charging nimh 3s on a li charger will leave them undercharged.ni want to hit around 1.5v/cell to get full.li charger only gets to 4.2v.
in 3p with them detected as ni would be best.
in the future i would look at modding your 3aaa lights to 18500 or 18650.
1 cell is easier to deal with than 3 when you have the limitation of a single cell charger.
If you go for parallel charging, ideally use a new pack of matched cells. IIRC, the problem with parallel charging is that because of the negative dV/dt, the first cell to reach full charge ends up getting more charge current than the others. You can avoid that if you stop charging a bit early.
Or you could go with serial charging, like packs do. Most cordless phones use 2-3 AAA cells in series and work for years without problems. You’ll be fine for a few weeks, although you might have slightly undercharged cells.