Product Description
Charge your Syma helicopter with out getting to drain your transmitter batteries or use a computer system in much less time. This charger will not perform correctly on Fake Syma S107 do to the fact they are wired diffrently
Product Details
- Shipping Weight: 10.1 ounces (View shipping rates and policies)
- ASIN: B004DETSN4
- Amazon Best Sellers Rank: 26 in Toys ; Games (See Top 100 in Toys ; Games)
- 1 inToys ; Games Hobbies Radio Control Accessories Battery Chargers
By : Syma
Price : $4.00
Product Capabilities
- 110V Charger for Syma Mini Helicopters
- Can be utilized on Syma Helicopters with smaller white Charging Plug
- More rapidly Charging with much less Battery Drain on Transmitter.
Customer Critiques
The charger has a fixed plug for North American outlets. The input is rated 100-240VAC, 50-60Hz. The output is rated 4.2VDC, 350mA (it's about 4.6VDC open circuit). There is an LED that lights dark yellow throughout charge, and green when charge is complete and when no battery is connected.
The LED actually begins to turn into a lighter yellow when the battery reaches 4.1V, a lighter yellow-green at four.15V, and is green at four.2V. If you only charge to four.1V, you will get alot more cycles but if you charge to four.2V, you get a longer flight time - it fundamentally averages out.
Through my testing, this charger only put out its rated output on exceptionally discharged batteries and just for a minute. It is normally only placing out about 250mA immediately after five minutes, with the battery at about 3.87V. The battery will reach 4.1V after about 40 minutes. It takes a further 15 minutes to reach four.2V, which may give you an extra minute flight time.
So you can see why I am a tiny dubious about men and women claiming that this charges their battery in 15-20 minutes. If accurate, I have to assume their batteries are old and only give a couple of minutes flight time. I commonly get about 7-8 minutes.
Nevertheless, this will charge the battery 20-40 minutes quicker than the USB cable charger, and the LED offers a reputable indication of when the battery is filly charged. I am only giving it three-stars because the output is weak (which is most likely good for a single 150mAh battery - I use 2 in parallel for 300mAh, with a 1.5 hour charge time, and a 15-16 minute flight time), and it would be good if the voltage was limited to 4.2V to minimize overcharging the battery.
I also measured the USB cable charger. It puts out about 250mA max, and the open circuit voltage is about four.6V. The battery reaches four.1V in about 60 minutes, and 4.2V in about 85 minutes. The USB plug will start out an occasional dim blink at about 3.93V and 35 minutes a dim glow/blink at about three.96V and 40 minutes and a dim glow at about three.99V and 45 minutes. The glow will get brighter as the voltage increases. Following about two hours, the battery voltage is four.3V and climbing.
With either the wall plug charger, or the USB cable charger, considering that they both have an open circuit voltage of 4.6V, I can only assume the battery will maintain rising in voltage till the safety circuit in the battery cuts off the charge. This may well ultimately shield the battery from failure, but is still not really good to charge LiPo batteries over four.2V. Do not leave the battery on either charger for extended periods.
This charger is fantastic. When I charge with the USB it takes about 1hr. This charger cuts it down to about 20-25 minutes. This truely lets you use your helicopter way more. Properly worth it and a awesome addition to the S107
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