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Found 2 results

  1. I bought some disposable AA lithiums from Amazon and tested for power capacity. Total power was a better benchmark since average voltage and Amp hours varied by 8% or so across the three brands. Total power makes more sense due to the switching "power" supplies in Lectro transmitters, since they are like a DC transformer with power in equal to power out (less small losses). I bought Eveready as a reference, NINMA since they claimed 3500 mAh, and EBL since I recognized the brand as a larger seller of battery products. The testing rig was a computer controlled battery tester made by West Mountain Radio. The test current was a constant 400 mA similar to Lectro transmitter current drain. I also calculated cost, corrected for power capacity using prices off Amazon. Amazon has coupons and scheduled delivery discounts that will vary over time. The corrected costs are as of today, 15 Oct 2023 for 24 batteries purchased at a time. Eveready Ultimate Lithium: 4.418 Watt hour 100% (reference) $2.79 2.79 corrected EBL Lithium: 4.212 Wh 95% $1.62 1.70 corrected NINMA Lithium: 4.146 Wh 94% $1.75 1.86 corrected Conclusions: The off brand lithiums would be a cost viable choice if you don't need the last few minutes of run time. A situation where NiMh won't run long enough but an Eveready Lithium is more time than you need. The NINMA brand had the highest current capacity but the average voltage was 8% lower. That reduced its power capacity. Eveready had the highest average voltage making it the highest capacity. EBL had good current and voltage putting it in the middle. EBL was the most cost effective. YMMV Best Regards, Larry Fisher
  2. I thought I'd start a new thread so it would be easy to find and be more easily searchable. So far the Quantum alkaline AA's are looking very good; 2.2 Ah for the Quantum versus 1.2 Ah for a Panasonic AA at a heavy drain (SM transmitter) of 400 mAh. That's an 83% improvement. (!) The second run is at 500 mAh and I got 2 Ah. This is an SM drain toward the end of the battery life. Pretty impressive. I still have to run the Panasonic at 500 mAh but it will probably only make 1 Ah. Adding to my original post, the Panasonic at 500 mAh made 1.1 Ah while the Quantum made 2.0 Ah for an 82% advantage again. It looks like the Quantum claims are very real. In an SM at 100 mW, the Panasonics ran for 97 minutes until the SM shutdown. The Quantums ran for 175 minutes. This is an advantage of 80%, in line with the precision battery load. I hope Duracell doesn't go nuts with the pricing. Best Regards, Larry Fisher Lectrosonics
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