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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.

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 8 reviews
Buzz Volta

Life in a lav mic is never easy. The 9Vs and AAs breezed through 4+ hours of operation barely diminished. What I appreciate most is, chargers and all, the compact space needed in the audio bag and that I can charge them on the way to the gig.

Gary Iverson
Best Rechargeable 9V Batteries We've Tried

We use these batteries to power some of our rental equipment. They're the only rechargeable 9V batteries (out of dozens we've tried) that hold a full charge and deliver enough power.

Best Batteries for Guitars

Pale Blue 9V is perfect for acoustic electric guitars and active pickup guitars that require a battery. Standard batteries leaked and corroded one of my acoustic electric guitars that is played less often than the others. After repairing the guitar, I decided that all of my guitars with built in tuners and active pickups deserved to have the best, so I replaced them all with Pale Blue. Now I don’t have to worry about damaging my expensive guitars with harmful (environmentally and monetarily) batteries.
Do yourself a favor and protect your investments and the environment.

Miles Wilder
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.

Shawn Lessord
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!!