TalentcellRechargeable 12V DC Output Lithium ion Battery Pack for LED Strip/Light/Panel/Amplifier and CCTV Camera with Charger, Multi-led Indicator Black (3000mAh)

So I like most people bought the spectra s2 just because it’s pink. I used this to make my pump portable and to use on the go. It has made a HUGE difference! It’s perfect for what I need.

Excellent for my spectra s2 breast pump to make it mobile.

I have some special equipment that requires a battery pack and needed to replace one, originally it was only provided by the manufacturer of the device. I put the specs into Amazon and found this and it was the identical battery pack for a much better price. I have since received and used this several times and I believe it is the same one. If you need a battery and this fits your needs, it is excellent.

Got this to use with my Spectra S2! I exclusively pump and this battery will last me multiple days! The battery also fits in the random cup holder perfectly too! It does take some time to fully charge, but I just place it on the charger over night, and it’s good to go by morning.

This power supply is great for upping the 5V voltage to 12V on my Arduino Motor Shield V2 by externally powering it via its positive and negative terminals. I can now run 12V motors without an issue... Almost. This thing only has one input/output barrel jack, where this would generally be an okay option for passthrough charging, in my case it doesn't work at all. I am splitting this power and stepping it down to 5V on one side going to a Jetson Nano, and the 12V that is split and not stepped down goes directly into the Arduino motor shield V2 board. The reason I am not just putting it directly into my Arduino Mega is because I am using the USB for serial communication, which means it will send power over that regardless and if I try to add 12 more volts it will damage my components most likely. This is where the input/output single barrel jack issue comes into play. I would be able to charge this battery with it off and not send power to the rest of my circuitry if it had a separate output. But with the splitter it still sends power down the line to my motor shield V2 and the jetson nano from the wall. However the wall power is not enough for the motor shield v2 to run the motors when split between itself and the battery in its off state. If it was I could look passed this issue. All in all its a little disappointing that I will have to make the battery removeable for charging (most likely using a 3d printed case to slide it into on the bot), but it's not the end of the world, as when I am not trying to pass through charge and I am just using battery power for the bot directly from the bank everything works as intended. If you wanted this battery to be more multi-faceted for developers and makers like me, possibly consider removing the power button all together and implementing a switch in the DC chord maybe, and then give it one input DC port and one output DC port. A 12V 3A battery with 2 DC ports in and out at an affordable price would be a product I'd buy for almost ever build lol. All in all its a solid battery, it just isn't exactly what I wanted originally. Had to get my hands on it to see first though!

Amazing if you want to make your spectra pump hands free!!!

I have a Celestron Nexstar telescope that requires a battery pack to operate. Unfortunately, I misplaced the battery pack. I found an OEM part that would cost me $30-$40, just for the wiring and housing. I would still need to use 4 AA batteries. I looked up their spec. It requires "DC5521" connector (5.5*2.1mm). I found this rechargeable battery pack with the exact connector I need, for less of the OEM "old tech" approach. If I opted for Celetron power bank, that would be around $99 solution!

Perfect replacement for the old battery.