[Q] How to measure the current consumption of a bicycle torch...
I have several flashlights that I use for my mountain bike hobby, some of good quality as the Serfas True 1500, and with a questionable quality I got in from DX (Deal Extreme), They have different LEDs, (P7 LED, T6, U2) , each giving a different amount of light. (two are mine and two of my wife)
Some of the batteries I have are good, but getting old, and the ones that come from DX, are not trust-able...
Now, I am planning to buy several LiPo batteries, and my question is capacity.
- Battery with low capacity will leave me without light halfway ..
- Battery with large capacity weigh much more and maybe are "over kill"
To do this, I want to measure that consumption of each lantern and then choose the correct battery capacity ..
Therefore, how can I measure the consumption of each torch, using the original batteries 7.4V.
Dump question that expects an correct clever answer
Thanks in advance
Current measured results...
Thanks, that is what I just made, and got interesting results.
For the Serfas True 1500+ Light at max power, I get 2.6A. That is, I need a battery with above of 9A for running for 3h 30min.
For the SSC P7-C light, the current is 1.5A (5.A for the complete 3:30)
For a new CREE LED XML-0L T6, the current is 1.25A 9around 4.34A for the 3:30)
Now, how do I measure the capacity of my current batteries?