Estry

Battery for Nihon Kohden Cardiolife 7621K Cardiolife 7631K Cardiolife 7721K Cardiolife 7731K ECG-1350 ECG-1350A ECG-1350C ECG-1350K ECG-1350P ECG-2320 ECG-2350 ETC-5521k TEC-5500 TEC-5521 TEC-5521C TEC-5521E TEC-5521K TEC-5531 TEC-5531C TEC-5531E TEC-5531

Q: How do I confirm this battery fits my device?

Match your device against the Compatible Model list, or compare the part number printed on your original battery. Still unsure? Email us with your battery details or photos and we will help you confirm.

$47.99 USD

~~$0.00 USD~~ $47.99 USD

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Title 2800mAh

12-Month Warranty30-Day Easy ReturnsShips from US in 48hUN38.3 & ISO9001 Certified

This is a 2800mAh 12V Ni-MH replacement battery for Nihon Kohden Cardiolife 7621K, Cardiolife 7631K and more, compatible with battery part numbers MD-BY01, NKB-301V, SB-551V and more.

Battery Specifications

Type:	Ni-MH
Weight:	749.0g
Dimension:	112.245.044.8mm
Category:	Medical
Voltage:	12V
Rate:	33.60Wh

Compatible Brand

Nihon Kohden

Compatible Model

Cardiolife 7621K
Cardiolife 7631K
Cardiolife 7721K
Cardiolife 7731K
ECG-1350
ECG-1350A
ECG-1350C
ECG-1350K
ECG-1350P
ECG-2320
ECG-2350
ETC-5521k
TEC-5500
TEC-5521
TEC-5521C
TEC-5521E
TEC-5521K
TEC-5531
TEC-5531C
TEC-5531E
TEC-5531K
TEC-5600
TEC-5601
TEC-5621
TEC-5631
TEC-7431
TEC-7500
TEC-7511
TEC-7521
TEC-7531
TEC-7600
TEC-7621
TEC-7621C
TEC-7621E
TEC-7621K
TEC-7631
TEC-7631C
TEC-7631E
TEC-7631K
TEC-7641
TEC-7651
TEC-7700
TEC-7721
TEC-7721C
TEC-7721E
TEC-7721K
TEC-7731
TEC-7731E
TEC-7731K
TEC-7741
TEC-7751
TEC-8352
TEC-9328
TEE-7731C

Compatible Battery Part Number

MD-BY01
NKB-301V
SB-551V
X065

⚠ Safety Warnings

Do not disassemble, puncture or modify the battery.
Never short-circuit the terminals or expose to heat / fire.
Do not mix with different batteries or chargers.
Recycle used batteries at designated collection points.

Why Choose Estry

✓ Grade A Cells — Premium cells with stable discharge and low self-discharge.

✓ Real Capacity — Capacity tested to match or exceed the original battery.

✓ Strict QC — Every battery passes charging/discharging and safety checks.

UN38.3 tested for safe transport. MSDS available upon request. Manufactured in an ISO9001 certified facility.

FAQ

How do I confirm this battery fits my device?

Match your device against the Compatible Model list above, or compare the part number printed on your original battery. Still unsure? Email us with your battery details or photos and we will help you confirm.

What is the warranty policy?

This battery is covered by a 12-month warranty against manufacturing defects, plus 30-day easy returns for peace of mind.

How fast will my order arrive?

In-stock orders ship from our US warehouse within 48 hours on business days.