One of the quietly great things about the R-series is that the battery is removable. The R38S continues that, and a battery swap is the easiest hardware “mod” in the hobby — though “mod” oversells it. Here’s how it goes and whether it’s worth doing.
Why bother
Two reasons. First, cells age, and a tired battery is the most common reason an older handheld stops holding a charge. Second, some replacement cells offer a little more capacity than the modest stock unit.
The swap
The R38S uses a standard removable lithium cell with a common 2-pin JST connector. Pop the back, disconnect the old cell, connect the new one, observe polarity religiously, and close up. No soldering on most units. It’s a ten-minute job.
Reality check on capacity
Don’t believe wild capacity claims printed on cheap cells — many are exaggerated. A genuine, correctly-sized replacement restores the runtime you’ve lost to age more than it dramatically extends it.
The honest win here is “as good as new,” not “double the battery life.” Treat the marketing numbers with suspicion.
Safety
Lithium cells deserve respect. Buy from a reputable source, never puncture or force a cell, and if a battery is swollen, retire it immediately and dispose of it properly.
Verdict
A genuinely useful, low-risk upgrade that extends the life of a device you’ve grown fond of. Just keep your expectations grounded and your sourcing trustworthy.