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  1. FLT MEDIC

    RCR & Charger Question

    Yes, I use the Ultrafire WF-138 charger which has a selector switch for 3.6v and 3.0v so I can charge both 3.7v and 3.0v RCR123s. It stops charging at 4.20v for 3.6v or 3.7v batteries and 3.60v for 3.0v batteries.
  2. FLT MEDIC

    New 18650 with 3000mAh from KD

    Many thanks for sharing and posting your test results, much appreciated! :)
  3. FLT MEDIC

    Tenergy RCR123A Problem?

    He's using a Surefire 6P flashlight with a M60W drop in which is rated up to 9v. That warning only applies to 6Ps using the P60 bulb. Blackhawk and many other dealers also do not recommend the use of rechargeable CR123As in the Gladius but 3.0v Tenergy RCR123As have been working in my Gladius...
  4. FLT MEDIC

    Tenergy RCR123A Problem?

    That's normal, my Tenergy batteries also do the above because its over-discharge protection kicks in when one of the battery's voltage while the light is ON drops to around 2.6v. Sometimes it still turns on after shutting down but it will only be ON for a few seconds. My flashlights do not...
  5. FLT MEDIC

    Which 3.0v (low voltage) RCR123's for my riverrock headlight?

    Been using Tenergy 3.0v 900maH protected RCR123As for my 6v Gladius the past 2 years. It comes off the charger at 3.8v but it settles down to 3.2v after about 10 minutes. I always wait at least 10 minutes or verify with my digital multimeter before using it in my Gladius to be sure. Using...
  6. FLT MEDIC

    Difference between Trustfire cells grey/blue?

    Thanks for the heads up, much appreciated! :)
  7. FLT MEDIC

    Tenergy 3.0V RCR123A final voltage?

    In that case, your Tenergy charger relies on the internal protection circuit of the Tenergy protected RCR123A which will stop accepting charge when the charger voltage reaches between 4.300v to 4.375v based on its spec sheet/chart above. The charger LED in turn turns green. If I use my...
  8. FLT MEDIC

    Tenergy 3.0V RCR123A final voltage?

    The Tenergy 3.0V, 900 mah, RCR123A batteries require a 4.2 volts charger and will not be fully charged by a 3.6v charger like other brands of protected RCR123A batteries. As soon as the charger shuts off, its voltage will be between 3.6v to 3.9v. After a few minutes, it will drop to 3.1v to 3.2v...
  9. FLT MEDIC

    Rechargeable batts for Insight Typhoon II

    I use Tenergy 3.0v 900 maH protected rechargeable CR123As/RCR123As from Battery Junction in my Blackhawk Night-Ops Gladius for the past 2 years. Make sure you get the 3.0v and not 3.6v rechargeable CR123A/RCR123A or else the 3.6v RCR123As will fry/kill your Insight Typhoon II. Good luck!
  10. FLT MEDIC

    HAS ANYONE FOUND A TRUE SINGLE CR123A 3.0V PROTECETED RECHARGABLE LITHIUM ION???

    I use the rechargeable Tenergy RCR123A 3.0v 900maH protected Li-Ion battery (from Battery Junction) for my Gladius instead of two primary CR123A batteries. It's 3.2v right off the charger but goes down and stays at 3.0v per battery when the Gladius is on. Good luck.
  11. FLT MEDIC

    Best RCR123A for a SF C2 LED?

    Bought Tenergy RCR123A 3.0v 900maH protected Li-Ion batteries from Battery Junction and they worked flawlessly the past 2 years in my stock Gladius. These have a longer life than my unprotected RCR123As. The only downside is that there's no warning it will shut off due to its low voltage...
  12. FLT MEDIC

    anyone bought batteries from tenergy?

    Bought Tenergy RCR123A 3.0v 900maH protected Li-Ion batteries from Battery Junction and they worked flawlessly the past 2 years in my stock Gladius. These have a longer life than my unprotected RCR123As. The only downside is that there's no warning it will shut off due to its low voltage...
  13. FLT MEDIC

    How do I tell which end of the LED is negative or positive?

    An LED tester is the best but if you have none, one can use a 3v lithium coin/watch battery (like CR2016, CR2032, etc.) to test 5mm to 10mm LEDs. Just insert the coin battery between the LED's wire terminals to see if it lights up. If it doesn't, reverse the LED terminals or flip the coin...
  14. FLT MEDIC

    At what voltage are alkalines considered dead?

    For 1.5v AA or AAA primary batteries, 1.3v "under load" as tested by your DMM is considered dead. For 1.2v Nicad or NiMH AA or AAA rechargeable batteries, 1.0v "under load" is considered dead.
  15. FLT MEDIC

    Battery packs: parallel or series?

    For a 12v, 20A drain lighting system a 12v 50Ah deep-cycle sealed lead acid battery (also called marine batteries by boaters) used in RVs and boats should give at least 2 hours runtime for your lighting system. Deep-cycle or marine batteries allow you to safely drain/use 70 to 80% of its...
  16. FLT MEDIC

    9v battery question

    The old smoke alarms just sound off when batteries are low or when the sensor is covered with dust unlike the better models or newer versions which only beep.
  17. FLT MEDIC

    New to the forum, battery question

    Yes, you can use both 1.5v Lithium and 1.2v NiMH. Used them in my 2AA Mini Maglite too.
  18. FLT MEDIC

    Rechargable 123's

    Yes, you can use 3.0v rechargeable CR123s for your 6v Xenon and 6v Xenon-6LED bulb flashlight. In case the bulbs in your flashlights are rated at 4.8v, the bulb will run brighter but have a shorter lifespan. I have converted many spot flashlights which come with 4.8v 0.75A bulbs (and has a...

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