110v Charger for SYMA Mini Helicopters S107 S105 S009 and others
Item Description
Charge your Syma helicopter with out having to drain your transmitter batteries or use a pc in much less time. This charger will not work properly on Fake Syma S107 do to the truth they are wired diffrently
Product Details
- Shipping Weight: 10.1 ounces (View shipping rates and policies)
- ASIN: B004DETSN4
- Amazon Best Sellers Rank: 18 in Toys ; Games (See Top 100 in Toys ; Games)
- 1 inToys ; Games Hobbies Radio Control Accessories Battery Chargers
By : Syma
Price : $4.52
Item Characteristics
- 110V Charger for Syma Mini Helicopters
- Can be applied on Syma Helicopters with little white Charging Plug
- More rapidly Charging with much less Battery Drain on Transmitter.
Client 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's about 4.6VDC open circuit). There is an LED that lights dark yellow in the course of charge, and green when charge is total and when no battery is connected.
The LED really begins to develop into a lighter yellow when the battery reaches four.1V, a lighter yellow-green at 4.15V, 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 essentially averages out.
During my testing, this charger only put out its rated output on incredibly discharged batteries and just for a minute. It is normally only placing out about 250mA just after 5 minutes, with the battery at about three.87V. The battery will reach four.1V immediately after about 40 minutes. It takes an additional 15 minutes to reach 4.2V, which might give you an additional minute flight time.
So you can see why I am a small dubious about many people claiming that this charges their battery in 15-20 minutes. If correct, I have to assume their batteries are old and only give a couple of minutes flight time. I commonly get about 7-8 minutes.
Still, this will charge the battery 20-40 minutes faster 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 considering the output is weak (which is possibly excellent 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 nice if the voltage was restricted to 4.2V 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 four.1V in about 60 minutes, and 4.2V in about 85 minutes. The USB plug will begin an occasional dim blink at about three.93V and 35 minutes a dim glow/blink at about three.96V and 40 minutes and a dim glow at about 3.99V and 45 minutes. The glow will get brighter as the voltage increases. Just after about two hours, the battery voltage is four.3V and climbing.
With either the wall plug charger, or the USB cable charger, because they both have an open circuit voltage of 4.6V, I can only assume the battery will keep rising in voltage until the safety circuit in the battery cuts off the charge. This may ultimately shield the battery from failure, but is still not superior to charge LiPo batteries more than four.2V. Do not leave the battery on either charger for extended periods.
This charger is fabulous. 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 a lot more. Well worth it and a amazing addition to the S107
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