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Science Portable Battery Charger featuring the photograph Willem Einthoven, Dutch Physiologist by Science Source

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Willem Einthoven, Dutch Physiologist Portable Battery Charger

Science Source

by Science Source

$54.00

This product is currently out of stock.

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Product Details

You'll never run out of power again!   If the battery on your smartphone or tablet is running low... no problem.   Just plug your device into the USB port on the top of this portable battery charger, and then continue to use your device while it gets recharged.

With a recharge capacity of 5200 mAh, this charger will give you 1.5 full recharges of your smartphone or recharge your tablet to 50% capacity.

When the battery charger runs out of power, just plug it into the wall using the supplied cable (included), and it will recharge itself for your next use.

Design Details

Einthoven standing beside his original string galvanometer in laboratory. Willem Einthoven (1860-1927) was a Dutch doctor and physiologist. He... more

Dimensions

1.80" W x 3.875" H x 0.90" D

Ships Within

1 - 2 business days

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Artist's Description

Einthoven standing beside his original string galvanometer in laboratory. Willem Einthoven (1860-1927) was a Dutch doctor and physiologist. He invented the first practical electrocardiogram (ECG or EKG) in 1903 and received the Nobel Prize in Medicine in 1924 for it. In 1901, Einthoven completed a series of prototypes of a string galvanometer. This device used a very thin filament of conductive wire passing between very strong electromagnets. When a current passed through the filament, the electromagnetic field would cause the string to move. A light shining on the string would cast a shadow on a moving roll of photographic paper, forming a continuous curve showing the movement of the string. His assignment of the letters P, Q, R, S and T to the various deflections is still used. The term "Einthoven's triangle" is named for him. It refers to the imaginary inverted equilateral triangle centered on the chest and the points being the standard leads on the arms and leg. After his developme...

 

$54.00