Can you charge with Iphone charger? Since the iphone wall charger has a USB adapter, can I just plug the heli USB into the Iphone charger and charger that way?
asked by Chucky B on December 17, 2010
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Yes, but do not use a charger supplying more than ~700 mA, an amperage typically used for charging an iPhone/iPod. (The Syma S107 forums support this opinion. Moreover, the prevailing USB 2.0 power standard is specified as 5 V @ 500 mA.) The Syma S107 has a battery protection circuit module that will presumably prevent overcharging, above 4.25 V. (It will also prevent the battery from being over discharged below 2.5 V.) A higher amp charger may charge the battery faster, but will likely shorten the battery life as well. Charging at a rate faster than 5C, (~12 minute charging time), could even cause the battery to catch fire and explode. The S107 uses a 150 mA battery, so charging it with a 700 mA charger implies a ~ 4.7C maximum rate. (In actual use, the S107 battery charges in ~40 minutes with a ~700 mA iPhone charger, a 1.5C rate, about the same as a standard 500 mA USB computer port. Apparently, the S107's battery protection circuit limits current as well as voltage.) Nevertheless, heed the caution listed in the manual and never charge the heli unattended even if using the USB standard amperage of 500 mA. You should also charge it on a nonflammable surface near a vent, just in case. To see a worst case scenario here, google "YouTube Lipo fire" .

If you are looking for a charger to use with the S107, take a look at this one:
iPod USB Travel Home Charger For Nano, Shuffle, 4G, Mini, Photo and U2 It supplies 700 mA and has a built-in IC chip which is designed to prevent overcharging. I purchased two from Eforcity for just over five dollars, including shipping. They appear to work well, although I have not used them extensively yet. Ideally, the battery should be charged at a 1C rate, ~1 hour. The lowest-cost USB charger sold by SF Planet at their website, nearly twice the cost of the Eforcity unit, appears to offer overcharging protection and variable rate charging that would fit this recommendation. It also carries CE and UL certifications, and bears an uncanny resemblance, (except for its USB slot instead of hardwired cable), to Syma's S107 charger that is sold separately for roughly three times the cost of the SF Planet charger. The Eforcity unit shows a CE certification in its picture on Amazon, but the units that I received do not have a CE mark on their stickers.
Cordell answered on December 19, 2010

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It comes with 2 ways to charge. Use the charging plug/cord in the remote control, or use the USB adapter. You don't need to buy anything separate to charge, except AA batteries for the remote control.
Matt answered on December 25, 2010

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Thanks so much for the detailed answer. The information is much appreciated.
Chucky B answered on December 19, 2010

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So does this helicopter not come with a charger?
Katie Brussa answered on December 20, 2010

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No, it does not come with a charger. Syma's designers provide a USB charging cable only. Their apparent thinking is that most people have a computer or cell phone charger with a USB interface and omitted a device-specific charger to cut the heli's cost. Syma does offer a charger separately, but it costs over ten dollars. To locate one, just search on Amazon using the keywords, "Syma S107 charger" .
Cordell answered on December 21, 2010

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Charging from the remote control quickly drains the batteries and takes significantly longer than charging via the USB cable/interface.
Cordell answered on December 25, 2010

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will the charge on a boost mobile phone loose charge being near a remote contol of any control?
Melinda G. answered on February 12, 2013
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