Product Details
- Shipping Weight: 10.1 ounces (View shipping rates and policies)
- ASIN: B004DETSN4
- Amazon Best Sellers Rank: 14 in Toys ; Games (See Top 100 in Toys ; Games)
- 1 inToys ; Games Hobbies Radio Control Accessories Battery Chargers
By : Syma
Price : $4.82
Item Description
Charge your Syma helicopter with out getting to drain your transmitter batteries or use a personal computer in less time. This charger will not perform adequately on Fake Syma S107 do to the truth they are wired diffrently
Product Functions
- 110V Charger for Syma Mini Helicopters
- Can be employed on Syma Helicopters with little white Charging Plug
- Faster Charging with much less Battery Drain on Transmitter.
Costumer Reviews
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 4.6VDC open circuit). There is an LED that lights dark yellow through charge, and green when charge is complete and when no battery is connected.
The LED basically begins to turn out to be a lighter yellow when the battery reaches 4.1V, a lighter yellow-green at 4.15V, and is green at 4.2V. If you only charge to 4.1V, you will get far 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 particularly discharged batteries and just for a minute. It is ordinarily only placing out about 250mA soon after 5 minutes, with the battery at about three.87V. The battery will reach 4.1V after about 40 minutes. It takes another 15 minutes to reach 4.2V, which may perhaps give you an added minute flight time.
So you can see why I'm a little dubious about individuals 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 normally get about 7-8 minutes.
Still, this will charge the battery 20-40 minutes faster than the USB cable charger, and the LED gives 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 probably excellent for a single 150mAh battery - I use two in parallel for 300mAh, with a 1.five 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 get started 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. 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 preserve escalating in voltage till the safety circuit in the battery cuts off the charge. This could ultimately shield the battery from failure, but is nevertheless not good to charge LiPo batteries over 4.2V. Do not leave the battery on either charger for extended periods.
This charger is superb. 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 additional. Nicely worth it and a good addition to the S107
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