Two budget LiFePO4 brands show up constantly in RV Facebook groups: Wattcycle and HumsiENK. Both are cheap, both claim 100Ah, and both have loyal fans. We compared them head-to-head so you don't have to gamble.
Round 1 — Price & value
Both brands sit in the same budget bracket. Wattcycle often runs the more aggressive coupon, while HumsiENK's UL9540A cell costs a little more but saves hassle on insured installs. For pure $/Ah they're within a few dollars of each other.
Round 2 — App & BMS
HumsiENK's 100Ah Bluetooth model gives you a clean per-cell app view out of the box. Wattcycle's app experience is similar on its Bluetooth cells. Either way, an app beats a dumb meter — don't buy a non-Bluetooth cell in 2026.
Round 3 — Certification
If your build needs to satisfy an inspector or an insurance rider, HumsiENK's UL9540A option is the safer checkbox. Wattcycle covers the standard UN38.3/CE set. Match the cert to your install's requirements.
Our pick
- Best all-rounder: HumsiENK 100Ah Bluetooth — app, value, and a clean build.
- Best if you need certification: HumsiENK UL9540A.
- Best deal hunter: Wattcycle store when coupons are live.
Shop the brands
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