Below spec 500 mw - will changing battery help?

3zuli said:

it doesn't matter if you have 2400 or 3000mAh - it's only the CAPACITY of battery, not the max current. 2400mAh means it can give 2,4A for 1 hour, or 1,2A for 2 hours, or 4,8A for 30 minutes etc.

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Thanks. Makes sense. But I guess the supplied battery could still be a dud so I'll order a couple of ultrafires and let you know if it makes any difference. I've found that with my other lasers, you only get full power if the battery is in tip-top condition. Any drop in voltage and the power goes right down. Hopefully a new battery will get me up to 500mw....

With a 500mW green the current draw on the battery will most likely be in excess of one amp. That will usually cause a significant voltage sag (as well as resulting in a much faster drain than you might expect, as the capacity is for a standard 0.1C =10 hour discharge). Try getting a good battery for high current draw.

dr-ebert said:

With a 500mW green the current draw on the battery will most likely be in excess of one amp. That will usually cause a significant voltage sag (as well as resulting in a much faster drain than you might expect, as the capacity is for a standard 0.1C =10 hour discharge). Try getting a good battery for high current draw.

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Thanks. Are ultrafire generally regarded as good batteries?

davidgdg said:

To be fair to DX, I've bought three lasers off them and all did what was on the label.

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Lucky you. How about the rest of the members here? The hundreds of lasers we've bought which were >90% of the time far below spec? We know exactly what we're talking about. With DX it's hope for the best, expect the worst. I wouldn't go classifying them as a dependable quality laser distributor just yet. I'm telling you this for your own good, sir.

I have the impression that the performance of hi-power greens form DX, FP et al is improving recently. If true, the question would of course be: will it last?