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I'm new to this forum. My name is Hans... and I've been an HO model railroader since 1982. I just recently had a helicopter ride in Arizona and decided to purchase an inexpensive helicopter for curiosity and for fun. Am I ever pleased I purchased the Syma S111G ! It's a beautiful little helicopter, is very stable and fun to operate. (I'm just starting my "practice flights" after getting lots of suggestions from the YouTube videos.) I'm so thrilled, I decided to purchase a S107G. It hasn't arrived yet, but I've spent quite a bit of time researching it. I'm excited! I do have three questions with regard to the battery, especially since there are so many cautions and warnings.
1. Does anyone know what shorter or longer charging times (with a computer) might signal for battery life? (My last charge went just over 60 minutes)
2. With correct charging (from a computer) and proper "cool down" procedures (30 - 60 minutes)... has anyone experienced a battery fire? If so, what was the cause?
3. What are the early signs a battery should be charged, if it's not just that operation stops?
Just an added comment -- I had a lot of difficulty finding a #00 Phillips screwdriver for my S111G. I finally located one -- at Menard's for $2.79 !! I just found it by telephone, so hopefully it's not too good to be true! I've always been fascinated by flight, so I'm very happy I heard about this group. I think "Dennis" clued me in on his YouTube video. Thanks to all of you! Hans
Ok, right down the line:
1. I can't do more than a rough approximation, however, I don't think that battery lifespan really affects the charge time too much, until it's almost kaput.
2. I have not heard of any of these catching fire. LiPo fires do exist, and can be caused by dramatic overcharging through too high of voltage and/or current. The worst anybody around here has had happen is not cooling down, causing the battery to become bloated, with its life juices and electrodes cooked and dead. Also, 30-60 minutes for cool down is excessive, unless you mean total between after flight and after charging. Personally, the battery is cool to the touch after about 5-7 minutes, rough approximation that i haven't measured, and is safely ready to fly in 15, 20-25 for extra concerned owners. Beyond that, you're wasting time and liable to forget to charge it or run out of time to fly it.
3. The early signs that you need to charge are, well, operation stops. The heli needs a lot more throttle to continue to fly, and quickly drops to a low, safe altitude. Personally, I am in the school of thought that you take your batteries to dead before charging. I spend a good while on mine turning them off and back on so they reset, power the motors for a few seconds until it shuts off again, and repeat until it just cannot move them anymore, as to prevent battery memory.
4. The screwdriver: What I've found best is cheap dollar store grade small/jeweler screwdriver sets. Something like 6 small screwdrivers, including Phillips and flat-head of varying sizes. Dollar tree has one, but it's all messed up, and I don't recommend it. Harbor Freight, Sears or Dollar General might have one, though. Worst comes to worst, find a cheap glasses repair kit with a Phillips. $2.79+tax is a tad much for just one screwdriver, when a good set runs $3 or so, and comes in handy more often than you think.
Something like this: http://www.amazon.com/Stanley-.....driver+set Not sure what the battery and other stuff is doing in the photos, but that's what you want.
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