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9v 800 mAh lithium USB Rechargeable Battery

Shaped like a normal 9v battery this unit provides approximately 8.2v at full charge and operates like any normal 9v battery cell. The only exception is that this unit is rechargeable! Plug in a micro USB port in the back to charge with your computer, the side indicator will show you the current charge of the unit. Please do take precaution and prevention from wire shortage and paying attention to polarity. Lithium batteries can explode from pressure, heat or voltage short.

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IMAX B6 LiPro Balance Charger + AC-DC Adapter

It is a very advanced smart charger for your LiPo/LiFe, NiCd and NiMH Batteries, capable of  managing 6S Li-ion/LiPo/LiFe and 15S NiCd/NiMH. The Display and straightforward controls make charging high volatile batteries safe and easy. Simply plug in a 12v DC power source up to a maximum of 5A on the right side and connect your battery with the balance cells (if needed) on the left side.

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RBC123 UPS Replacement Battery Cartridge 12V 7Ah
US$129.01
UPS replacement battery cartridge. This is a lead-acid 12volt 7Ah battery pack which fits selected APC Smart-UPS and Back-UPS, restoring power back-up...
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BAT-H-18650 18650 Battery Holder - Single Cell
US$1.99
This is a plastic single cell Battery Holder for a 18650 Polymer Lithium Ion Rechargeable Battery. Price is per single unit.
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BAT-T-4S 4-Cell Lithium Battery Power Indicator 16V
US$2.79
Connect the positive and negative terminals of the display board and connect them to the positive and negative terminals of the tested battery. The digital display shows the real-time battery power shown by the indicated bars.
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BAT-T-3S 3-Cell Lithium Battery Power Indicator 12V
US$2.79
Connect the positive and negative terminals of the display board and connect them to the positive and negative terminals of the tested battery. The digital display shows the real-time battery power shown by the indicated bars.
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BAT-T-2S 2-Cell Lithium Battery Power Indicator 8V
US$2.79
Connect the positive and negative terminals of the display board and connect them to the positive and negative terminals of the tested battery. The digital display shows the real-time battery power shown by the indicated bars.
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BAT-T-1S 1-Cell Lithium Battery Power Indicator 4V
US$3.41
Connect the positive and negative terminals of the display board and connect them to the positive and negative terminals of the tested battery. The digital display shows the real-time battery power shown by the indicated bars.
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534-91 Battery Clip AA x1 (CR2)
US$0.69
This is a nickel plated single aluminum clip for AA /CR2 type batteries. Features Material:  .020” (.51mm) Aluminum 2 mounting holes....
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150-336 4 x AA Cell Battery Holders with DUPONT Male Jumper Wires
US$1.76
4 x AA Cell Battery Holders with DUPONT Male Connector
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Lipo Battery Charging/Discharging Board (5V/1A)
US$1.25

This tiny blue board is what you usually find in power banks. This board allows the user to charge their battery system using the USB female port and MicroUSB works as the discharging port. The battery is connected from the top pads on the bottom which indicate B+ and B-. To be safe, you can use the battery holder for the 18650s and solder the wires to the board.

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DFR0563 Gravity: I2C 3.7V Li Battery Fuel Gauge
US$18.75
3.7V lithium batteries are commonly used in many projects. However, the remaining power and voltage of the lithium battery are highly nonlinear. We can only roughly judge whether the battery is full or almost empty according to its voltage. The Gravity I2C 3.7V Lithium Battery Fuel Gauge employs Gravity I2C interface, ultra-low operating current, and real-time tracking of the relative state of charge (SOC) of the battery through Maxim's patented algorithm, eliminating the need for full-to-empty relearning and offset accumulation errors. Plug and play to accurately measure the voltage and remaining power of the battery. The module also features as a low battery power alert interrupt function. When the battery power falls below specified threshold, the ALR pin generates a falling pulse to trigger the external interrupt of the controller.
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BAT-CHARGER9 9VDC LI-ION/NI-MH/NiCd Battery Charger – 12W
US$9.94
This charger is capable of charging one or two 9V style LIPO/NI-MH/ NICD batteries. It can provide a maximum of 1A current output and is programmed to cut off or lower current when required.
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150-337 Four "AA" Cell Battery Holder w/ solder tab terminal connection, 50mm long cable, JST SM Male Plug
US$1.81
The 150-337 is a four "AA" Cell Battery Holder with solder tab terminal connection. The cable is about 150mm long with a JST SM male plug.
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DFR0564 USB Charger for 7.4V LiPo Battery
US$9.09
Still using a big, bulky, traditional power adapter to charge your lithium battery? DFRobot provides you with a compact and efficient 7.4V lithium battery USB charger, only the size and weight of an ordinary Gravity sensor. With just a mobile phone AC adapter (or power bank) and an Android data cable, you can safely and efficiently charge the 7.4V lithium battery up to 1A, which commonly used in various robots and motor drivers. The light-weight and micro USB interface features make it ideal for outdoor applications. In addition to serve as a charger, it can also be embedded in a variety of 7.4V lithium battery-powered projects, adding a USB charging function to it, eliminating the need for battery swapping and the use of traditional bulky power adapters.
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T-BAT12V 12V Car Battery Tester
US$18.15
This is a useful inexpensive tester for car battery state, alternator state as well as OK to charge battery state. Has a 6-LED display that clearly presents the alternator and battery states. Large insulated ground battery clamp and needle test tip makes it easy to use. Compact and light weight, easily can be kept in car. Suitable for 12V lead acid batteries, hardtop batteries, discharge batteries and maintenance free batteries.
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BAT-L-9V 600 mAh 2 Cell Lithium Polymer/Lipo Battery in a PP3 9VDC Battery Format
US$12.53
This is a 2 cell lipo battery that is in the shape of a regular 9VDC battery (type PP3). It reaches 8.4VDC when fully charged.  Use a charger that is capable of charging two cell batteries.
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