03503A HP Calculators

Review HP Hard Case For 45

The HP 03503A is a high-quality calculator battery specifically designed for HP-35 and HP-45 calculator models. This long-lasting, lithium-ion rechargeable battery offers a reliable solution for powering your calculator, ensuring uninterrupted use in various academic and professional applications.

The dimensions of the HP 03503A battery are 3.6 inches (9.1 cm) in length, 1.6 inches (4 cm) in width, and 0.4 inches (1 cm) in height. Weighing only 1.6 ounces (45 grams), this compact battery is easily portable, making it an ideal companion for those constantly on the go.

The HP 03503A battery delivers a nominal voltage of 3V and a capacity of approximately 1250 mAh. With this power capacity, you can expect up to 10 hours of continuous use on a single charge, providing ample time to complete complex calculations and data analysis tasks.

To recharge the battery, simply plug the included charging cable into the battery and a power source. The battery features a convenient charging indicator that displays the charging status, allowing you to easily monitor the charging process. A full charge typically takes around 2 hours, ensuring you can quickly get back to work once your battery runs low.

The HP 03503A battery is engineered for durability and compatibility. Its rugged design can withstand the rigors of daily use, while its compatibility with HP-35 and HP-45 calculator models ensures a perfect fit and seamless integration.

In summary, the HP 03503A is an essential accessory for HP-35 and HP-45 calculator users, offering a reliable, long-lasting, and portable power solution. Its compact design, impressive capacity, and quick charging capabilities make it an indispensable tool for students, professionals, and anyone who requires a high-performance calculator.

The HP 03503A is an original HP replacement battery for HP-35 and HP-45 calculators. Here are some pros and cons that might help you decide if purchasing this battery is the right choice for you:

1. Authentic HP Product: The HP 03503A is an original HP battery, ensuring compatibility and reliability with HP-35 and HP-45 calculators.

2. Long Lasting: HP claims that this battery can last up to 150 hours, making it ideal for extended use.

3. Easy Installation: The battery is designed to be easy to install, and users report that it can be replaced quickly and without any complications.

4. Environmentally Friendly: Since it is a rechargeable battery, it reduces the need for disposable batteries, making it a more eco-friendly option.

1. Cost: The HP 03503A is more expensive than alkaline or lithium batteries, which might be a deterrent for some users.

2. Limited Availability: Due to its age, the HP 03503A might be harder to find in stores or online compared to other batteries.

3. Charging Time: The battery takes around 6 hours to fully charge, which might be longer than some users prefer.

4. Compatibility: Although the battery is specifically designed for the HP-35 and HP-45 calculators, there have been reports of compatibility issues with certain models.

In conclusion, the HP 03503A offers several advantages, including authenticity, long battery life, easy installation, and eco-friendliness. However, it also has some disadvantages, like cost, limited availability, longer charging time, and potential compatibility issues.

If you frequently use your HP-35 or HP-45 calculator and are willing to invest in a high-quality, long-lasting battery, then the HP 03503A is an excellent choice. However, if you are looking for a more affordable option or prefer a battery with a shorter charging time, you might want to consider alternative solutions. Ultimately, the decision depends on your specific needs and budget.

Details:

Also suitable for Hp 45 and 55. Hewlett Packard hard case for Hp 35 calculator. The case is in great condition.

specifications vintcalc:

• brand: Hp
• mpn: 03503a
• model: Hp 03503a
• part type: Calculator Case
• country of origin: United States
• vintage: Yes

general vintcalc:

• category: Electronics > Vintage Calculators

offer vintcalc:

• prices: $16.99–$49.99
• item condition:
  • Used
  • New
• started: february 8, 2026
• availability: in stock
• options: ship-to-home
• best offers: true
• sold #: 8
• in stock #: 3

returns vintcalc:

• policy: no returns

payments vintcalc:

• other
• credit card: mastercard
• wallet: apple-pay

seller vintcalc:

• city: cincinnati, ohio
• rating: 100.0%
• # reviews: 545

shipping vintcalc:

• service: usps ground advantage
• type: calculated
• transit: 4-9 days
• class: standard
• carrier: usps