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$11.45 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F4S-12V-40A-Lithium-iron-phosphate-battery-Charge-discharge-protection-board-overcharge-protection-discharge-protection%2F32714599899.html ) 4S 12V 40A Lithium iron phosphate battery Charge discharge protection board overcharge protection, discharge protection for just $11.45

$11.45 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F4S-12V-40A-Lithium-iron-phosphate-battery-Charge-discharge-protection-board-overcharge-protection-discharge-protection%2F32714599899.html ) 4S 12V 40A Lithium iron phosphate battery Charge discharge protection board overcharge protection, discharge protection for just $11.45

$8.93 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FBMS-4S-8A-14-8V-Li-ion-PCM-Battery-Protection-Board-Voltage-Regulary-Module-with-MOS%2F32588244222.html ) BMS-4S 8A 14.8V Li-ion PCM Battery Protection Board Voltage Regulary Module with MOS Transistor Battery Charge Free Shipping for just $8.93

$8.93 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FBMS-4S-8A-14-8V-Li-ion-PCM-Battery-Protection-Board-Voltage-Regulary-Module-with-MOS%2F32588244222.html ) BMS-4S 8A 14.8V Li-ion PCM Battery Protection Board Voltage Regulary Module with MOS Transistor Battery Charge Free Shipping for just $8.93

$0.75 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FHigh-Quality-New-1PC-5V-1A-Micro-USB-18650-Lithium-Battery-Charging-Board-Charger-Module-Protection%2F32519584563.html ) 5V Micro USB 1A 18650 Lithium Battery Charging Board Charger Module With Protective New Battery Charger Module for just $0.75

$0.75 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FHigh-Quality-New-1PC-5V-1A-Micro-USB-18650-Lithium-Battery-Charging-Board-Charger-Module-Protection%2F32519584563.html ) 5V Micro USB 1A 18650 Lithium Battery Charging Board Charger Module With Protective New Battery Charger Module for just $0.75

$4.25 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FDual-USB-5V-1A-2A-Mobile-Power-Bank-Charger-Module-Solar-Power-18650-Battery-Charging-Board%2F32785900832.html ) Dual USB 5V 1A 2A Mobile Power Bank Charger Module Solar Power 18650 Battery Charging Board Boost Step Up Module For Phone DIY for just $4.25

$4.25 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FDual-USB-5V-1A-2A-Mobile-Power-Bank-Charger-Module-Solar-Power-18650-Battery-Charging-Board%2F32785900832.html ) Dual USB 5V 1A 2A Mobile Power Bank Charger Module Solar Power 18650 Battery Charging Board Boost Step Up Module For Phone DIY for just $4.25

5PCS 5V 1A Mini USB 18650 Lithium Battery Charging Board Charger Protection TE106

5PCS 5V 1A Mini USB 18650 Lithium Battery Charging Board Charger Protection TE106

1PCS Micro USB 5V 1A 18650 Lithium Battery Charger Module Charging Board With Protection

1PCS Micro USB 5V 1A 18650 Lithium Battery Charger Module Charging Board With Protection

Micro USB 18650 Lithium Battery Charger Module Charging Board With Protection

The Adafruit Feather nRF52 Bluefruit is the latest easy-to-use all-in-one Bluetooth Low Energy board, with a native-bluetooth chip, the nRF52832!  It's a take on an 'all-in-one' Arduino-compatible + Bluetooth Low Energy with built in USB and battery charging.

The Adafruit Feather nRF52 Bluefruit is the latest easy-to-use all-in-one Bluetooth Low Energy board, with a native-bluetooth chip, the nRF52832! It's a take on an 'all-in-one' Arduino-compatible + Bluetooth Low Energy with built in USB and battery charging.

Here is the simple solar battery charger circuit designed to charge a 5 - 14v battery using LM317 voltage regulator. It is very simple and inexpensive.

Solar Battery Charger Circuit using LM317 Voltage Regulator

Here is the simple solar battery charger circuit designed to charge a 5 - 14v battery using LM317 voltage regulator. It is very simple and inexpensive.

$26.00 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FDongguan-new-energy-lithium-polymer-battery-865876-5000mah-lithium-battery-charging-treasure%2F32321283184.html ) Dongguan new energy lithium polymer battery 865876-5000mah lithium battery charging treasure for just $26.00

$26.00 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FDongguan-new-energy-lithium-polymer-battery-865876-5000mah-lithium-battery-charging-treasure%2F32321283184.html ) Dongguan new energy lithium polymer battery 865876-5000mah lithium battery charging treasure for just $26.00

Two 18650 PROTECTED Orbtronic Li-ion (Panasonic inside) 3.7V Batteries & Battery Charger Kit for high performance Flashlights. - End-of-charge voltage detection assures the safe and full charge any time - - Short-circuit protection - - Over voltage cut-off protection=prevents damage to your battery due to over voltage - - Complete individual channels=convenience; prevent 2 batteries charge each other - - Charge Method: CC/CV=Charge battery fully and quickly - - Charging portable devices…

Two 18650 PROTECTED Orbtronic Li-ion (Panasonic inside) 3.7V Batteries & Battery Charger Kit for high performance Flashlights. - End-of-charge voltage detection assures the safe and full charge any time - - Short-circuit protection - - Over voltage cut-off protection=prevents damage to your battery due to over voltage - - Complete individual channels=convenience; prevent 2 batteries charge each other - - Charge Method: CC/CV=Charge battery fully and quickly - - Charging portable devices…

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