This innovative USB-C rechargeable battery pack brings your vintage HP calculator back to life!

I was tired of having to constantly buy new N-Size batteries and was also not satisfied by the amount of charge in the standard rechargeable pack, so I decided to design one to use in my HP-41 series calculators.

This brand-new, professionally 3D-printed battery pack is specifically designed for HP-41C/CV/CX calculators.

Features:

• USB-C Rechargeable: Ditch the disposable batteries and enjoy the convenience of modern charging. Includes a USB-C cable for easy connection to any USB power source (USB adapter not included).
• Long-lasting Power: Equipped with a high-capacity 1200mAh Li-Po battery, this pack provides over 40 hours of continuous use for your HP-41 calculator.
• Fast Charging: Recharge the battery in approximately 1.5 hours using a USB-C wall adapter (not included).
• Durable Design: Professionally 3D printed in Nylon for a strong and lightweight construction.
• Easy Installation: Simply replace the original battery compartment with this custom-designed pack.

Notes:

• Charging: While the battery can be charged inside the calculator, for optimal lifespan, I recommend removing the pack for charging.
• 3D printed note: The 3D printed case may have slight cosmetic variations due to the printing process. Functionality is not affected.

What's included:

• 1x USB-C Rechargeable Battery Pack (3D printed in Nylon)
• 1x USB-C Charging Cable

Give your beloved HP-41 calculator a new lease on life with this eco-friendly and convenient rechargeable battery solution!

Please note: This is an aftermarket product not affiliated with Hewlett-Packard.

Compatible models:

• HP-41C
• HP-41CV
• HP-41CX
• HP-41CL

Don't wait - upgrade your HP-41 calculator today!