3000 lumens will require about 34W of continuous power, or around 8.5A assuming that the lantern has a single 18650. With a 4Ah capacity, that would predict a full-brilliance runtime of about half an hour. Ergo, the claimed output and battery capacity are irreconcilable. Most likely, many things are being overstated here. Without a unit to dissect and directly test, I will speculate that the light output is probably closer to 800 lumens (about a quarter of what’s claimed), the full-brilliance runtime is really more like 10 to 20 minutes before heat causes the LEDs to throttle back to a much lower output level, with a total runtime that might actually reach two to three hours, and the battery’s actual capacity is likely about 2200 mAh at most. That latter spec is based largely on the relative cost of real 18650 cells; NONE produce more than 3600mAh, and those highly specialized 3600 units are more expensive than could be included here.
The SecureBright lanterns often sold on this group of sites are a much better deal in my opinion, although the use of a rechargeable 18650 gives this one a level of economy in use that the SecureBright units lack due to their use of AA and AAA cells.
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Warranty
90 days
Estimated Delivery
Friday, Oct 14 - Tuesday, Oct 18
3000 lumens will require about 34W of continuous power, or around 8.5A assuming that the lantern has a single 18650. With a 4Ah capacity, that would predict a full-brilliance runtime of about half an hour. Ergo, the claimed output and battery capacity are irreconcilable. Most likely, many things are being overstated here. Without a unit to dissect and directly test, I will speculate that the light output is probably closer to 800 lumens (about a quarter of what’s claimed), the full-brilliance runtime is really more like 10 to 20 minutes before heat causes the LEDs to throttle back to a much lower output level, with a total runtime that might actually reach two to three hours, and the battery’s actual capacity is likely about 2200 mAh at most. That latter spec is based largely on the relative cost of real 18650 cells; NONE produce more than 3600mAh, and those highly specialized 3600 units are more expensive than could be included here.
The SecureBright lanterns often sold on this group of sites are a much better deal in my opinion, although the use of a rechargeable 18650 gives this one a level of economy in use that the SecureBright units lack due to their use of AA and AAA cells.