solarforce XP-G 4.2 vs Solarforce P7

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solarforce XP-G 4.2 vs Solarforce P7

Using the same host shortened L2M for single cr123 use and same 3.7 RCR123 battery, which would be brighter the correctly driven XP-G or the P7 which is supposed to be driven at 6 volts ?


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Last seen: 10 months 3 weeks ago
Joined: 01/12/2010 - 16:32
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Location: Scotland

It really depends on the cell and driver. A properly driven MC-E is a 9-10W device. That is asking an awful lot from an RCR123.


2.5A (Actually more as the voltage will sag like crazy on that load) is not a very good idea - cell life will be short. Those sorts of loads will mean replacing the cells often. Most protected cells won't allow such currents for long - if at all.

You'd need something like IMR cells to get anything like full output. You might get 5-10 minutes runtime out of it at full power.


If your RCR cells have low internal resistance, the MC-E might be brighter. But I'd expect the R5 to be brighter and run for longer.


The numbers from my light tests are always to be found here.