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

Product Details

• Shipping Weight: 10.1 ounces (View shipping rates and policies)
• ASIN: B004DETSN4
• Amazon Best Sellers Rank: 13 in Toys ; Games (See Top 100 in Toys ; Games)
• 1 inToys ; Games Hobbies Radio Control Accessories Battery Chargers

By : Syma
Price : $4.83

Item Description

Charge your Syma helicopter with out having to drain your transmitter batteries or use a personal computer in much less time. This charger will not function properly on Fake Syma S107 do to the truth they are wired diffrently

Item Capabilities

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

Costumer Critiques

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 is about four.6VDC open circuit). There is an LED that lights dark yellow during charge, and green when charge is total and when no battery is connected.

The LED in fact starts to turn out to be 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 significantly more cycles but if you charge to 4.2V, you get a longer flight time - it basically averages out.

In the course of my testing, this charger only put out its rated output on extremely discharged batteries and just for a minute. It is ordinarily only placing out about 250mA following 5 minutes, with the battery at about three.87V. The battery will reach 4.1V right after about 40 minutes. It takes an additional 15 minutes to reach four.2V, which may well give you an extra minute flight time.

So you can see why I'm a tiny dubious about folks 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 quite often get about 7-8 minutes.

Nonetheless, this will charge the battery 20-40 minutes quicker than the USB cable charger, and the LED provides a dependable indication of when the battery is filly charged. I'm only giving it 3-stars simply because the output is weak (which is possibly really good for a single 150mAh battery - I use two 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 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 four.2V in about 85 minutes. The USB plug will start off 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. Right after about 2 hours, the battery voltage is 4.3V and climbing.

With either the wall plug charger, or the USB cable charger, considering that they each have an open circuit voltage of 4.6V, I can only assume the battery will keep escalating in voltage till the safety circuit in the battery cuts off the charge. This might ultimately shield the battery from failure, but is nevertheless not excellent to charge LiPo batteries over four.2V. Do not leave the battery on either charger for extended periods.

This charger is brilliant. 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 extra. Nicely worth it and a good addition to the S107