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D USB Rechargeable Smart Batteries


Fast Charging Lithium Battery

1000+ Charge Cycles

Convenient charging with both micro USB and USB-C charging ports on every battery
Just plug any micro USB and USB-C 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!

2 Pack:
- 2 Pale Blue D Batteries
- 1 Charging Cable

4 Pack:
- 4 Pale Blue D Batteries
- 2 Charging Cables

6 Pack:
- 6 Pale Blue D Batteries
- 3 Charging Cables

Chemistry: Lithium Ion
Power [W-h]:  7.5 Watt hours
Voltage: 1.5V
Capacity: 5000 mAh
Charge Time: Under 5 hours (depending on charger specifications)
Cycle Rating:  1000+ Cycles
Charging Cable: 1 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: 3
Lithium Content: 0.54g
Individual Battery Weight: 74g

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 12 reviews
Michael Muldoon
Great Big Power with lots of options

I’ve been searching for a D battery that could power my battery operated motion lights. The Pale Blue D batteries were perfect. The ability to charge via micro USB or USB C was the perfect fit. An added bonus was the lighter form factor of the lithium battery vs. standard single use batteries. They are the last D batteries I’ll need to buy for sure.

Russell Soft

D USB Rechargeable Smart Batteries

Greg Ingraham
Great batteries

I tried the Pale Blue D USB rechargeable batteries as I was looking for a battery I could recharge from a device I already owned. They recharge via a USB connection and charge in a reasonable time and run well. I have not yet gone through a full charge but the performance has been just as good as any "throw away" battery. The batteries even come with a cable that allows recharging multiple batteries at once.

Full 1.5v all the way

Love these batteries. Full 1.5v and they don't leak. Quick to charge too.

matthew pulsipher
Love these batteries!

The charge holds for a long time and they recharge much faster than I expected. I love that I'm not using disposables anymore!