MakerHawk 3.7V 6000mAh LiPo Battery Rechargeable 1S 3C Lithium Polymer Batteries with Protection Board Insulated Rubber Tape, PH2.0 Plug for Arduino ESP32 Board RPI UPS (2 Pack)

Heavy, because it's full of power! It's very handy to have a pack with this kind of power capacity for my various ESP32 and even Pi Pico projects, although depending on what specific board I'm working with I need an adaptor for the connector.

Large capacity battery that I use for my raspberry pi projects. Works well, and charges good with a TP4057. I cut the connector off but it was the larger JST style connector, and it did seem connected solidly and the wire are thick.

This Battery is a well-made, high-quality battery with excellent packaging. Using an A-grade lithium cobalt oxide cell system, it offers high energy density and steady discharge performance, ensuring consistent power output for my project needs. I installed it as a replacement battery for my Garmin GPS device, an older model with preloaded maps, which is essential for navigation in remote areas without cell signal. This makes a high-capacity battery incredibly valuable.Safety is a top priority, especially for DIY projects. Since I keep my GPS in a backpack in the trunk surrounded by potentially flammable items, a safe, reliable battery is essential. This battery meets UN 38.3 standards and has passed rigorous testing for safety and reliability. The built-in protection board is an outstanding feature. When the voltage drops to 3.0V, the circuit automatically shuts off to prevent over-discharge, while it also provides overcharge protection by cutting off power once the voltage reaches 4.2V. In the event of a short circuit, the protection circuit will shut off within milliseconds, preventing reactivation and significantly enhancing safety—allowing me to use it with complete peace of mind.The battery is also very convenient to use. It comes with a PH2.0 plug, which easily connects to Arduino, ESP32, and other development boards without needing extra adapters. With its rated 6Ah capacity, I haven’t tested it precisely with instruments, but it powers my Garmin GPS for a full day, leaving about 20% charge remaining. For my needs, this is more than sufficient.

This 6000mAh battery has the dimension as advertised. It has a JST 2.0 plug. It has similar build quality as other MakerHawk and MakerFocus batteries. It works as expected. If you need this size of battery, this is a good option.

Battery works fine, but mine came with the pins reversed from what is usually used on ESP32s. Don't plug this directly into anything without checking polarity. Only of note because ESP32s are mentioned in the title, the battery is otherwise fine.

These are good quality LiPo cells, however I can only give it 3-stars because it missed the rated capacity of 6000 mAh and not it didn't even come close to the rated 3C or 18A continuous current output. The output protection circuit cut off output anytime I exceeded 3A. Also on charging, typically you can charge at 1C, however these will not charge above 0.5C or 3A. It has otherwise performed quite well. The attached photo shows the final results after 3 charge/discharge cycles and a full final charge of 5090 mAh or about 15% below rated capacity. It is indeed at 906090 cell, or just below 9mm thick, 60mm wide and 90mm long.

I tested the capacity of this battery with my IMAX B6. Draining it down to 3V yeilded 5888mAH which is close enough in my book.

I needed more battery power for my remote Raspberry PI greenhouse installation. The MakerHawk LiPo battery is bigger and offers a larger capacity. I have it connected to a UPS board for the PI and it charged quickly. It appears to be maintaining the charge very nicely and my PI is working well.