![]() I suspect that in most cases, photographers do not work this way. It is best not to do what I did and fire continuously at full power until depleted. Lithium batteries are well known for overheating when used in an extreme way such as this. Once they had cooled down, I put them back in but only managed a few flashes before they died again., They have now gone into my "reserve PC mouse" box of old AA batteries. ![]() I put it down to the fact that Lithium batteries are obviously made differently and react more to high usage.īecause of this, I wanted to check that the other batteries had indeed been depleted. However, this didn’t happen with the other two sets. After all, I was firing at full power as soon as they had recycled each time. Did the same and got to 124 so I continued.īy the time I got to 466, I reached the 30 second threshold so I stopped.Īs my office cooled after opening a window, I seemed to get longer periods of firing and got up to 80 flashes in a row before the batteries overheated. I got up to 82 and they overheated again. I was fuming as I had high hopes.Īfter a while, the batteries had cooled right down so I put them back in the speedlight and continued firing. So, I went online to Amazon looking for the supplier so I could get a returns ticket. (Apparently the Canon Speedlights have an internal security system whereby they will shut down in the case of overheating which is cool. So, how did they do?Īfter 59 flashes, they stopped and got incredibly hot so I took them out of the Canon 580EX II. The other two, more expensive and powerful batteries were reassuringly heavy and lasted very well. Almost the same weight as these, and they were awful. After all, the poor, poor, Wilko batteries were very light. I was expecting big things from these batteries but the first thing I noticed was how light they were and I got worried. Energizer Ultimate Lithium AA Batteries - £1.45 each Surprisingly, I got the exact same amount of flashes (229) out of the Duracell AA batteries before I reached the 30 second benchmark for powering up for the next discharge.Īgain, excellent batteries. They are great when I need something powerful and reliable for any gadget when the Energizers are not charged or available.Įither the Energizer or Duracell batteries are superb for just about anything. The Duracell's are my back-up or "go to" battery. I prefer Energizer AA batteries for my rechargeable stock for powering my speedlights. Duracell Ultra Power AA Batteries - £1.16 each Good for speedlights and they would be excellent for any less power hungry gadgets. Later, it would rise to about 16 seconds when I reached half power and then 30 seconds at the end and counting.Įxcellent batteries and very reliable. Up to around 100 flashes, I had to wait about 5 seconds between each manual flash. These Eco Advanced batteries lasted for 229 flashes before I hit the 30 second barrier for enough recharge to fire again. I love Energizer batteries and rarely have any problems with them other than a "leaky death" after a lot of use when using the rechargeable batteries. Energizer Eco Advanced AA batteries - £1.24 each Useless for speedlights and power hungry gadgets but possibly ok for low power things such as your computer mouse. By the end, I was waiting for more than 20-30 seconds for each re-charge. In all, I got just 20 flashed before the battery was exhausted. The first flash fired and then I had to wait a fair bit before there was enough charge for the second. These are the results: Wilko FunctionalĪt 0.08p each, I wasn’t expecting much and I wasn’t disappointed. To test them, I ran each set of four through my Canon 580EX II speedlight on full power to see how many flashes I got.
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