Li-ion wins for weight, capacity, and staying power — but NiMH is cheaper and less fussy about chargers.
Let’s get the li ion vs nimh comparison over fast: lithium-ion is lighter, holds more power for the same size, and doesn’t lose charge sitting on a shelf. That’s why nearly every modern radio ships with Li-ion. NiMH is the older tech — heavier, lower capacity, and it self-discharges, so a battery left in a drawer for two months comes back flat.
So why does NiMH still exist? Price, mostly. NiMH packs cost less, and they’re more tolerant of abuse — you can overcharge them a bit, run them down hard, leave them in a hot truck, and they’ll keep going. If you have a crew that treats gear badly, NiMH might honestly be the more economical battery type for you.
One catch: the battery type and the charger must match. Most radios are designed for one chemistry, and you can’t always drop a Li-ion pack into a radio that shipped with NiMH, even if the shape fits — the charging profile is different, and the wrong profile can damage cells or shorten their life. Check the manual before you buy.
For most people, a lithium battery radio is the answer. Want my honest take on which packs last longest? Read our battery life guide. When you’re ready, our radio batteries section lists which chemistry each pack uses, with matching chargers.