Bests & Worsts Reviews from Amazon

The EBL 18650 Lithium Rechargeable Batteries (this product) arrived with ~3.75V terminal voltage, meaning they are ~50% charged. I fully recharged two cells on my XTAR VC4 charger before testing. [Capacity Matters] To measure the capacity of each EBL Li-ion battery, I connected a 5-ohm power resistor as load, and monitored the output voltage and current over time. See the discharge curves (Current vs Time) on the chart I uploaded. Observe that both cells delivered just around 2000mAh, before their output voltages dropped below 3.0V. This falls short of the advertised 3000mAh capacity. Just for reference, the Odec 18650 cell (here) is rated 2600mAh, yet it delivered ~2630mAh under identical test conditions. To be fair, those EBL 18650 are not the worst batteries I have tested. Base on my experience so far, 90% of the lithium-ion rechargeable batteries I purchased from Amazon are sold under grossly inflated capacity numbers. See my uploaded chart of ‘Advertised vs. Measured Capacity’ for a summary. [Weight Matters] I compared the weights of various 18650 Li-ion cells, using my electronic kitchen scale: - Odec 2600mAh (measured ~2630mAh)): 47g - LiCB '6800mAh' (measured ~2350mAh): 45g - EBL '3000mAh' batteries (measured ~2000mAh): 44.5g - Probe Shiny '3200mAh' (measured ~1150mAh): 36g - MuchBuy '9800mAh' (measured ~1125mAh: 36g - STAND HIGH '5000mAh' (measured ~1210mAh): 35.5g - USB Batter '3800mAh' (measured ~900mAh): 32.5g - UltraFire '6800mAh' (measured ~420mAh): 31.5g So we can see there is a positive correlation between weight and actual capacity of a battery. [Bottom Line] The EBL 18650 batteries are advertised as 3000mAh, but they can only deliver 2000mAh under my most undemanding test conditions. I’m sick and tired of finding so many off-brand batteries on Amazon with inflated capacity numbers. I have already sent those batteries back for a refund. Hopefully if enough people do the same, Amazon will finally take action against products sold under false advertisements. World Peace and Cure for Common Cold will soon follow… (Hey, we can always dream)