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9V USB Rechargeable Smart Batteries


Fast Charging Lithium Battery
1000+ Charge Cycles

Convenient Micro USB Charge Port
Just plug any micro USB cable or use the included cable to charge two batteries at once.

Built-In LED Charging Indicator
Pale Blue Batteries let you know when they are fully charged.

On-Board Smart Technology Provides Safe Charging
No more batteries ruining expensive electronic devices!

Most smoke detector and carbon dioxide detector manufacturers recommend not using rechargeable or rechargeable lithium batteries in their products. Always double check your smoke detector and carbon monoxide detector instruction manuals and manufacturer’s recommendations before making the right battery selection. When in doubt, do not use rechargeable or rechargeable lithium batteries in your detectors.

What's Included:

2 Pack:
- 2 Pale Blue 9V Batteries
- 1 Charging Cable

4 Pack:
- 4 Pale Blue 9V Batteries
- 2 Charging Cables

6 Pack:
- 8 Pale Blue 9V Batteries
- 3 Charging Cables

Chemistry: Lithium Ion
Power [W-h]:  4 Watt hours
Voltage: 9
Capacity: 450mAh
Charge Time: Under 3 hours (depending on charger specifications)
Cycle Rating:  1000+ Cycles
Charging Cable: USB to 2 Micro USB
Charge State Indicator: Red Green LED
Protection Circuit: Integrated safety circuit protects battery and device
Overheat Protection: Operating at max output the battery will not overheat, this is part of the protection circuit.
Other Safety Protections: Protects against Overload, Leakage, Short Circuit, Over Voltage, & High Temperature
Certifications: IEC 62133, CE, FCC, PSE, UN38.3, RoHS, REACH
Operating Temperature Rage: -20c -> 60c, (-4F-> 140F)
Self-Discharge: The dormant / self discharge characteristics of Pale Blue batteries are very low. This is one of the advantages of a lithium ion battery with a control circuit, vs an alkaline or NiMh battery, where the cell discharges directly into the circuit (no control circuit). The battery life in dormant mode depends partly on the environment. High ambient temperatures, and higher humidity, increases the internal drain. But in normal circumstances a battery installed in a device, like a door lock, will last ~12 months.
Cells Per Battery: 2
Lithium Content: 0.3g
Individual Battery Weight: 28g

Free domestic shipping on orders $49 & Up

- 30 day return limit on all orders

- We are not currently shipping internationally. To get updates on when we will be shipping to your region sign up for our newsletter!

- One year warranty for defects in material or workmanship from the date of purchase. Please contact us at with any issues you may have or if you require a return authorization number. In order to process your return, we will need the defective product returned to us along with your return authorization number and your proof of purchase. Upon receiving defective products, Pale Blue will provide replacements or refunds at our discretion.

A different kind of rechargeable battery.

With our advanced lithium rechargeable technology, Pale Blue batteries charge 5x faster than conventional Ni-MH rechargeable batteries. Pale Blue batteries provide higher power and more consistent output through their use cycle.


Customer Reviews

Based on 6 reviews
Excellent Batteries, Don’t Do What I Need

I was excited to get two rechargeable 9v batteries because I am a musician and need two 9v’s: one in my guitar and one in the e-bow I have. The e-now works great! The battery is strong and I get good tone, but the battery in the guitar is a big huge nope. As soon as I put the Pale Blue battery in the guitar I started getting this really loud hum and it’s definitely the battery. I’m pretty disappointed because that’s the battery I go through the most and I’d like to find a better solution than throwing away 9v’s every couple months. I’m definitely a convert though. I think when I’m ready to replace the batteries in my headlamp/non-audio electronics I’ll definitely be getting more Pale Blue batteries.


I have a total of 6 9V batteries. I was a little disappointed to find that your batteries are slightly longer than a standard 9V battery, so they will not always fit. I have also noticed that the 9V batteries wear down quickly. I have used them in my keypad safes. A regular battery will last a year or more in this setting. I find the Pale Blue batteries need replacement in about 3 weeks. I have many of the D, AA and AAA batteries and they work well.

The best battery ever

I never write reviews, however I have to say I put on in a smoke detector and it lasted longer than a name brand, and I can recharge it and replace not throwing anything away!

Make the switch, trust me you won't be disappointed!!

Great for bands!

We use the rechargeable 9V batteries in our in-ear monitors every show. One battery will last a whole night (3 sets over 4 hours) and through most of a second night! We also use them in effects pedals and they work so well we haven’t had to change that battery for several weeks! Very good investment!

So good

Works very well.