batteries
Post on 30-Dec-2015
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BATTERIES
Primary– Zinc– Alkaline (most
common)– Lithium (camera,
watch)
Secondary (rechargeable)– Sealed lead acid (car)– Gel– NiCd– NmHd– Lithium
Important specs– Energy density– Voltage
» Zinc/Alkaline: 1.5 V» Lead Acid: 2.0 V
cars: 6, 12 V
» NiCd: 1.2 V Power tools: 4.8,
6.0, 7.2, 9.6, 12, 18 V
– Maximum current» “Cold-cranking amps”
– Capacity» Amp-hours or mAHrs
Capacity and discharge
12 V (10 cell) NiCd pack rated at 1300 mAH– 1.3 Amps for 1 hour – 520 mA for 2.5
hours…..in theory
Top-notch cells for RC racing can provide 2300 mAH
9V alkaline– 580 mAH @ 12 mA (can
deliver 12 mA for 48 hrs)
Discharge curve
t
9V
Alkaline technology
See www.duracell.com (or other sites) for more
mA
Hrs
100
1
10010
Service life
Battery technologies
Chemistry Energy density(W-H/Kg)
Cell voltage
NiCd 38 1.2
Lead Acid 40 2.0
NiMH 57 1.2
Carbon-Zinc 75 1.5
Alkaline 130 1.5
Lithium 300 3.0
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