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3.7V-4.2V 800mAh 18650 rechargeable battery cell

Features: Brand: 3.7V 18650 sizes Cylindrical Li-Ion Cell No memory effect and longer storage life than NiMH Batteries Lighter weight and higher energy density than any other rechargeable battery It is excellent to use as standard for text battery analyzer, used in DIY projects and power banks.

3V 250mAh CR2032 Coin Cell Battery 20mm HUA DAO lithium 2032 cell

CR2032 Lithium metal 3V 250mAh button cell battery. Great for powering low power processors or blink an LED for weeks

DC 9V 1A Power Supply Adapter

See this product in video click on the following link: Input: 100V - 240V AC, 50 - 60 Hz 0.5A Output: 9V DC 1000mA Weight: 121g

Solar Panel 12V 2.1W Monocrystalline silicon

Material: Monocrystalline Excellent weak light effect High conversion rate, high efficiency output Suitable for charging cellphone and small DC batteries Build your DIY powered models, solar display , solar light and solar toys, etc