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Calibration and Testing Tools

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TO-120 8 in 1 Hex/Allen key Set
US$6.99
A hex key, also known as an allen wrench, can help you easily fasten or loosen bolts, particularly those that are small and difficult to reach with other tools. Often used for Radio Controlled devices, this simple and easy to use tool comes with 8 different key sizes. Hex keys are easy to carry with you!
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BAT-T-10 LiPo Battery Tester & Low Voltage Buzzer 1S to 8S
US$11.19
If you ever wanted to find out what the voltage was on your LiPo battery, this little device can measure the voltage and readout the value to indicate when the voltage for a cell is past a setting that you may have set it to. LiPo batteries are happy around 3.7v to 3.2v any lower and it can often never recharge again, any higher and it could be affected by reducing the lifespan of the battery. The speaker will sound when the voltage is too low, offering a reminder to charge the battery.
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BAT-T-20 3-cell LiPo battery low-voltage alarm
US$6.65
Those small modules are made to prevent Lithium-Polymer (LiPo) batteries to lose too much power and get damaged. Six LEDs show you which battery has enough charge and which don’t, and a loud (95dB) alarm starts as soon as one of the batteries attached gets under 3.3V.
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