POERUNI 12V 200Ah LiFePO4 Battery vs DJLBERMPW 12V 200Ah LiFePO4 Battery

Both are 12V 200Ah LiFePO4 batteries with about 2.56 kWh of usable energy, so the choice comes down to documentation and track record. The POERUNI publishes a full spec sheet: UL testing on the cells, cycle counts at 60%, 80% and 100% depth of discharge, a 10-year life claim and a stated weight. The DJLBERMPW listing gives almost nothing beyond voltage and dimensions, and its stated dimensions are far too large for a 200Ah battery, which suggests the listing is sloppy. Buy the POERUNI unless you can confirm the DJLBERMPW's BMS limits, cell grade and warranty in writing.

• Choose the POERUNI if you want a battery whose cycle life, BMS, temperature range and series/parallel limits are published, so you can size a solar or RV bank with confidence.
• Choose the DJLBERMPW only if you can verify its BMS current rating, cell grade and warranty terms from the seller before buying.