Welch Allyn 72300

Welch Allyn 72300 Rechargeable Battery (3.5 V, NiCd)

The Welch Allyn 72300 is a 3.5 V, 800 mAh Nickel-Cadmium replacement battery for classic Welch Allyn 3.5 V rechargeable power handles. It is commonly used with otoscopes and ophthalmoscopes in primary care, ENT, and ophthalmology.

Quick Fit Guide

• Fits: 3.5 V rechargeable handles including 71000-A, 71000-C, 71020-A, 71020-C, 71055-C.
• Does not fit: 71900 Li‑ion Smart Handle, 2.5 V pocket handles, C-cell battery handles, or 71670 (uses 72200).
• Terminal style: Button-top positive on one end, flat negative on the other.

When to Choose the 72300

• Use if you have a classic Welch Allyn 3.5 V rechargeable handle listed above and want dependable, cost-effective power.
• Avoid if your handle is the Li‑ion Smart Handle (71900) or model 71670 (requires 72200 with different terminal configuration).

Key Specs

• Voltage: 3.5 V
• Capacity: 800 mAh (nominal)
• Chemistry: Nickel-Cadmium (NiCd)
• Approx. size: length 2.8 in (71 mm), diameter 0.9–1.0 in (23–25 mm)
• Operating temp (typical): -4 to 140°F (-20 to 60°C); charging 32 to 113°F (0 to 45°C)

Runtime and Charging

• Typical continuous runtime: about 60–90 minutes at full intensity with halogen instruments; longer with intermittent use and LED heads. Actual time varies by lamp type and brightness setting.
• Charging time: commonly 12–16 hours in standard Welch Allyn well/desk chargers; faster bases may replenish in 3–5 hours.
• Cycle life: up to ~500 charge cycles with proper care.

Installation (about 2 minutes)

1. Power off and remove the instrument head.
2. Unscrew the handle cap and slide out the old battery.
3. Align polarity: insert the 72300 with the button-top (+) toward the instrument head.
4. Reassemble and place the handle on a compatible charger until fully charged.

Care, Safety, and Best Practices

• Charge after use; avoid prolonged deep discharge. Perform a full discharge/charge cycle about once a month to help maintain capacity.
• Store cool and dry; remove from handle for long-term storage. Label install date and rotate spares.
• Keep contacts clean; wipe with isopropyl alcohol if needed.
• Use only compatible Welch Allyn chargers. Do not short, crush, or incinerate.
• Recycle NiCd batteries per local regulations due to cadmium content.

Compatibility and Alternatives

• 72300: Standard choice for most classic 3.5 V rechargeable handles (71000/71020/71055 series).
• 72200: Required for handle 71670; different terminal design (not interchangeable).
• 71900 Smart Handle: Uses internal Li‑ion system; 72300 not compatible.

What’s Included

Battery only. Handles, instrument heads, and chargers are sold separately.

FAQ

How do I confirm this fits my handle?

Check the handle model number on the knurled body or cap. If it lists 71000-A, 71000-C, 71020-A, 71020-C, or 71055-C, the 72300 is the correct battery. If your handle is 71670, use 72200; if it is 71900, it uses Li‑ion and does not take this battery.

Will the 72300 work with LED otoscope/ophthalmoscope heads?

Yes. LED heads generally draw less power and may extend runtime compared with halogen bulbs. Ensure the head is designed for 3.5 V handles.

How long will the battery last before needing replacement?

With daily clinical use and proper charging, many users see 1–3 years of service. Capacity gradually declines with cycles, heat, and storage conditions.

Does this battery have memory effect?

NiCd batteries can exhibit capacity loss if repeatedly recharged after very short uses. A monthly full discharge/charge can help mitigate this. Avoid leaving the battery deeply discharged for extended periods.

Is the 23300 desk charger compatible?

The 23300 is a Welch Allyn desk/well charger model. If your handle is compatible with that charger and uses the 72300 battery, you can charge it in that unit. Verify charger/handle compatibility in the handle’s manual.