1. What Are LR44 and AA Batteries?

LR44 and AA are the two most common battery types used in children's calculators. LR44 is a small button cell battery, while AA is the standard cylindrical battery used in many electronic devices.

2. Battery Comparison

• LR44: Compact size, lower capacity (150mAh), used in slim calculators
• AA: Larger size, higher capacity (2000-3000mAh), used in bulkier models

3. Choosing the Right Battery

Check your calculator's battery compartment or manual. Most calculators clearly indicate which battery type they require.

4. Battery Replacement Guide

Steps: Turn calculator off, open battery compartment, note orientation, replace with same type, ensure proper polarity.

5. Frequently Asked Questions (FAQ)

Q1: Can I use substitutes for LR44?
A: Yes, equivalents include AG13, A76, 357, SR44 (check voltage compatibility).

Q2: How long do calculator batteries last?
A: Typically 1-2 years with normal use (AA lasts longer than LR44).

Q3: Are rechargeable batteries okay?
A: Yes, but note rechargeable AAs are 1.2V vs 1.5V for alkaline.

Q4: Why won't my calculator turn on after battery change?
A: Check polarity, battery contacts, and try fresh batteries.

Q5: Are lithium batteries better?
A: Lithium AA batteries last longer but cost more (not available for LR44).