110v Charger for SYMA Mini Helicopters S107 S105 S009 and others

Item Description

Charge your Syma helicopter with out getting to drain your transmitter batteries or use a laptop or computer in much less time. This charger will not work adequately 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: 15 in Toys ; Games (See Top 100 in Toys ; Games)
• 1 inToys ; Games Hobbies Radio Control Accessories Battery Chargers

By : Syma
Price : $4.52

Item Functions

• 110V Charger for Syma Mini Helicopters
• Can be applied on Syma Helicopters with little white Charging Plug
• Faster Charging with less Battery Drain on Transmitter.

Customer Testimonials

The charger has a fixed plug for North American outlets. The input is rated 100-240VAC, 50-60Hz. The output is rated four.2VDC, 350mA (it's about four.6VDC open circuit). There is an LED that lights dark yellow during charge, and green when charge is full and when no battery is connected.
The LED truly starts to become a lighter yellow when the battery reaches four.1V, a lighter yellow-green at four.15V, and is green at 4.2V. If you only charge to 4.1V, you will get extra cycles but if you charge to 4.2V, you get a longer flight time - it essentially averages out.
In the course of my testing, this charger only put out its rated output on very discharged batteries and just for a minute. It is normally only placing out about 250mA just after five minutes, with the battery at about three.87V. The battery will reach 4.1V soon after about 40 minutes. It takes one other 15 minutes to reach four.2V, which might give you an additional minute flight time.
So you can see why I'm a tiny dubious about people today claiming that this charges their battery in 15-20 minutes. If true, I have to assume their batteries are old and only give a couple of minutes flight time. I generally get about 7-8 minutes.
Nonetheless, this will charge the battery 20-40 minutes more quickly than the USB cable charger, and the LED offers a dependable indication of when the battery is filly charged. I am only giving it 3-stars for the reason that the output is weak (which is most likely decent 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 great if the voltage was limited to four.2V to reduce 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 4.1V 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 3.96V and 40 minutes and a dim glow at about 3.99V and 45 minutes. The glow will get brighter as the voltage increases. Soon after about two hours, the battery voltage is 4.3V and climbing.
With either the wall plug charger, or the USB cable charger, because they each have an open circuit voltage of 4.6V, I can only assume the battery will preserve rising in voltage until the safety circuit in the battery cuts off the charge. This might ultimately shield the battery from failure, but is nevertheless not great 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 far more. Well worth it and a outstanding addition to the S107