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Old 05-16-2016, 07:32 PM #129
LEDbeam's Avatar
Class 1M Laser
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 65
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Join Date: Feb 2016
Location: Wisconsin
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Rep Power: 65
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Default Re: Just ordered a 1W 501B from sci-fi!

Quote:
Originally Posted by EllyEnthusiastic View Post
edit: Forgot to mention, the batteries are fine, they fully charge, I've metered them and their voltage is fine-- better than, actually. They're rated 3.7V, but one came out at 4.17V.
After my laser died, I got my batteries tested too and got the exact same results. I had them tested at an electronics store. Right away after I heard about the voltage being higher than specified, I figured the higher voltage probably fried my laser's diode, but the technician told me that a higher voltage reading is actually normal. He said that anything below 3.7v is considered "dead" on a 3.7v battery, and that they should be closer to 4.1 or 4.2v when charged. That kind of surprised me since regular AA batteries are 1.5v, yet rechargeable AA batteries are only 1.2v, and they aren't "dead" at all.


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Old 05-17-2016, 02:13 AM #130
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Class 3B Laser
 
Join Date: Mar 2006
Location: Utah
Posts: 4,002
Rep Power: 2310
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Razako Razako is online now
Class 3B Laser
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Join Date: Mar 2006
Location: Utah
Posts: 4,002
Rep Power: 2310
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Default Re: Just ordered a 1W 501B from sci-fi!

Quote:
Originally Posted by TombyG View Post
You're talking about 3 different battery chemistries here. First off Li Ion batteries are not dead at 3.7 volts so you can through that idea out the window. Secondly you should never let the battery drain past ~2.8 volts without causing irreversible effects. When fully charged they are actually 4.2 volts so that part is accurate. Thirdly AA nonchargeable batteries are alkaline batteries and rechargeable batteries are either NMHD or NiCadiums so the voltage is not the same as alkalines. Really this is battery basics people.
Correct on all counts.
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700mw 405nm Sanwu Challenger(782mw peak 730ish mw average)
Sanwu Spiker Series 3W 445nm
2W O-like 450nm(2.2W average/2.25W peak) and Ebay 450nm THOR M II laser(1600mw average/1700 mw peak)
1.4W Jetlasers PL-E Pro 462nm(average 1490mw)
5.05W 465nm build by AlienLaser and 3.5W 465nm Jetlasers PL-E pro.
50mw 515nm challenger(85mw average) and 5-30mw penlaser
1W 520nm Sanwu Spiker series with beam expander
800mw 532nm Jetlasers PL-E Pro (850mw average, 988 mw peak) and 450mw laserglow Hercules with X10DR beam expander
8mw
561nm project box build(8-9mw average 10 mw peak)
589nm Dragon Lasers Spartan 50(51mw average/70mw peak)
593.5nm 2-5mw CNI penlaser(2-3mw average)
638nm Sanwu Spiker series(860mw average) and 500mw O-like 638nm pointer
639nm Sanwu Silver Series Tribeam(1700mw average/1800mwpeak)
1W 650nm Jetlasers PL-E Pro(1038mw average 1087mw peak)
671nm 100mw Red DPSS labby from LillyElectronics
685nm box pointer with laserlands 15mw module.

Meters:
Laserbee 3.7W usb LPM


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