---
product_id: 14285819
title: "Exell A21PX 4.5V Alkaline Battery – Replaces Eveready 333, 523, PX21, PC133A – Fits Mac Plus, Electro-Voice Mic, Polaroid Flash, GE Radio, Smoke Detector, Vintage Electronics"
brand: "exell battery"
price: "22817CFA"
currency: XOF
in_stock: true
reviews_count: 8
url: https://www.desertcart.sn/products/14285819-exell-a21px-4-5v-alkaline-battery-replaces-eveready-333-523
store_origin: SN
region: Senegal
---

# 600mAh capacity Compact 1x1x1 inch size 4.5V stable power Exell A21PX 4.5V Alkaline Battery – Replaces Eveready 333, 523, PX21, PC133A – Fits Mac Plus, Electro-Voice Mic, Polaroid Flash, GE Radio, Smoke Detector, Vintage Electronics

**Brand:** exell battery
**Price:** 22817CFA
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your nostalgia with precision and reliability!

## Quick Answers

- **What is this?** Exell A21PX 4.5V Alkaline Battery – Replaces Eveready 333, 523, PX21, PC133A – Fits Mac Plus, Electro-Voice Mic, Polaroid Flash, GE Radio, Smoke Detector, Vintage Electronics by exell battery
- **How much does it cost?** 22817CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/14285819-exell-a21px-4-5v-alkaline-battery-replaces-eveready-333-523)

## Best For

- exell battery enthusiasts

## Why This Product

- Trusted exell battery brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect Classic Fit:** Specifically designed to replace Eveready 333, 523, PX21, and PC133A batteries for seamless compatibility.
- • **Lightweight & Compact:** At just 22.68g and 1-inch cube, it fits snugly without bulk, preserving your device’s original form factor.
- • **Audio & Visual Revival:** Ideal for Electro-Voice mics, Polaroid flashes, and classic Mac Plus clocks—bring your retro gear back to life.
- • **Legacy Tech Powerhouse:** Delivers consistent 4.5V voltage to keep your vintage devices alive and thriving.
- • **Trusted US-Based Quality:** Manufactured and supported in the USA, ensuring reliable performance and peace of mind.

## Overview

The Exell A21PX 4.5V Alkaline Battery is a compact, high-performance replacement battery designed for vintage electronics including Mac Plus, Electro-Voice microphones, Polaroid flash units, and classic radios. With a stable 4.5V output and 600mAh capacity, it ensures reliable power for legacy devices, backed by trusted US-based manufacturing and support.

## Description

Full description not available

## Features

- 🔋 Reliable 4.5V Power – Stable voltage for legacy tech, audio gear, and safety devices
- 🖥️ Mac Plus & Classic Fit – Used in original Macintosh clock and CMOS battery slots
- 🎙️ Electro-Voice & Audio Gear – Replaces Eveready 333 in classic condenser mics
- 📸 Polaroid & Flash Units – Compatible with vintage cameras and strobe gear
- 🇺🇸 US-Based Company – Trusted performance with support from US-based facility

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Dimensions | 1 x 1 x 1 inches |
| Item Weight | 22.68 g |
| Battery Weight | 0.1 Ounces |
| Unit Count | 1 Count |
| Battery Cell Type | Alkaline |
| Recommended Uses For Product | Radio |
| Reusability | Single Use |
| Battery Capacity | 600 Milliamp Hours |
| Amperage | 4.5 Amps |
| Voltage | 4.5 Volts |

## Product Details

- **Number of Batteries:** 1 Product Specific batteries required. (included)
- **Brand:** Exell Battery
- **Battery Cell Composition:** Alkaline
- **Battery Capacity:** 600 Milliamp Hours
- **Recommended Uses For Product:** Camera

## Images

![Exell A21PX 4.5V Alkaline Battery – Replaces Eveready 333, 523, PX21, PC133A – Fits Mac Plus, Electro-Voice Mic, Polaroid Flash, GE Radio, Smoke Detector, Vintage Electronics - Image 1](https://m.media-amazon.com/images/I/51BQwngFQBL.jpg)

## Questions & Answers

**Q: what are the battery sizes? My old battery has these specifications: Height: 2.36" (60 mm); Diameter: 0.66" (16.8 mm). It's the same?**
A: PX21 / 523 4.5V alkaline batteries equivalent to A133 EN133A PC133A V21PX RPX21 A21PX EPX21 3LR50 1306AP. Type: Alkaline. Voltage: 4.5 V. Diameter: 16.8 mm
Looks like it is the same

**Q: Is this 600 mah**
A: Yes this battery is 600mAh

**Q: What is the amp-hour rating?**
A: Hello Greg,It is 650mAh.

**Q: What are the dimensions of this battery?**
A: Product Dimensions: 1.6 x 1 x 2.2 inches

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good buy
*by A***R on April 17, 2025*

This battery is not available in Japan, so I am very happy to have been able to purchase it.

### ⭐⭐⭐⭐⭐ Fits the Macintosh Plus perfectly
*by E***. on October 20, 2024*

Counter to another reviewer's experience, this battery fit the Macintosh Plus's battery compartment perfectly, and is the exact same height as the original Energizer 523. Perhaps the other reviewer's metal contacts were bent due to age. It does indeed appear to be three 1.5-volt half-AA batteries heat-shrink-tubed together, which is fine.

### ⭐⭐⭐⭐ It works!
*by A***N on April 11, 2025*

Doesn't have a full charge, but given the age at least it works. My 1986 Macintosh is working again. Hopefully it lasts a while.

## Frequently Bought Together

- Exell Battery A21PX 4.5-Volt Alkaline Battery (White)
- Saft LS14250 3.6V 1/2AA Lithium Battery, 3.6 Volt 1200mAh, GE Simon XT

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**Shop now:** [https://www.desertcart.sn/products/14285819-exell-a21px-4-5v-alkaline-battery-replaces-eveready-333-523](https://www.desertcart.sn/products/14285819-exell-a21px-4-5v-alkaline-battery-replaces-eveready-333-523)

---

*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-02*