TP General - Battery technologies comparison

5.872 bytes

Service Hints & Tips

Document ID: GSMH-39PFHN

This document is provided to IBM and our Business Partners to help sell and/or service IBM products. It is not to be distributed beyond that audience or used for any other purpose.

TP General - Battery technologies comparison

Applicable to: World-Wide

Service Information:

Type

Energy densigy by weight (Watt-hrs/kg)

Energy densigy by volume (Watt-hrs/liter)

Voltage per cell

Cycle life

Monthly self-discharge %

Comments

Lead acid

30

80

2.1

500+

7

- low cost
- constant trickle charge
- quick charge (degrades life)
- heavy
- leakage is dangeous

NiCad

40-50

120

1.2

500

15

- memory effect hampers cycle life
- constant voltage
- long self life (retain charge)

NiMH

60

150

2.2

500+

15

- expensive, but price is decreasing with volumes
- 25% better battery life than NiCad
- less memory problems than NiCad

Lithium ion

95-100

220

3.5

1000+

12

- difficult to produce multicell packs
- most environmentally acceptable
- no memory effect
- very expensive
- cheaper fuel gauges

Alkaline

50

90

1.5

N/A

0.16

- not rechargeable

Search Keywords

Hint Category

Power

Date Created

04-09-96

Last Updated

06-04-99

Revision Date

06-04-2000

Brand

IBM ThinkPad

Product Family

ThinkPad 300, ThinkPad 310, ThinkPad 315, ThinkPad 340, ThinkPad 345, ThinkPad 350, ThinkPad 355, ThinkPad 360, ThinkPad 365X/XD, ThinkPad 365C/CS, ThinkPad 365CD/CSD, ThinkPad 365E/ED, ThinkPad 370, ThinkPad 380, ThinkPad 380D, ThinkPad 380E, ThinkPad 380ED, ThinkPad 380XD, ThinkPad 380Z, ThinkPad 385D, ThinkPad 385E, ThinkPad 385ED, ThinkPad 385XD, ThinkPad 390, ThinkPad 390E, ThinkPad 400, ThinkPad 500, ThinkPad 510, ThinkPad 560, ThinkPad 560E, ThinkPad 560X, ThinkPad 560Z, ThinkPad 600, ThinkPad 600E, ThinkPad 700, ThinkPad 701, ThinkPad 710, ThinkPad 720, ThinkPad 730, ThinkPad 750, ThinkPad 755C/CS, ThinkPad 755CE/CSE, ThinkPad 755CX, ThinkPad 755CV, ThinkPad 755CD, ThinkPad 755CDV, ThinkPad 760C, ThinkPad 760E, ThinkPad 760CD, ThinkPad 760L/LD, ThinkPad 760ED, ThinkPad 760XD, ThinkPad 760EL/ELD, ThinkPad 760XL, ThinkPad 765L, ThinkPad 765D, ThinkPad 770, ThinkPad 770E/ED, ThinkPad 770X, ThinkPad 770Z, ThinkPad i Series 1400, ThinkPad i Series 172x

Machine Type

2615, 2600, 2610, 2620, 2618, 2619, 2625, 2624, 9545, 2635, 2636, 2626, 2603, 2604, 2640, 2641, 2645, 2646, 9552, 2630, 2523, 2524, 9546, 9547, 9548, 9549, 9544, 2611, 2627

Model

Various

TypeModel

Retain Tip (if applicable)

N/A

Reverse Doclinks
and Admin Purposes

Type	Energy densigy by weight (Watt-hrs/kg)	Energy densigy by volume (Watt-hrs/liter)	Voltage per cell	Cycle life	Monthly self-discharge %	Comments
Lead acid	30	80	2.1	500+	7	- low cost - constant trickle charge - quick charge (degrades life) - heavy - leakage is dangeous
NiCad	40-50	120	1.2	500	15	- memory effect hampers cycle life - constant voltage - long self life (retain charge)
NiMH	60	150	2.2	500+	15	- expensive, but price is decreasing with volumes - 25% better battery life than NiCad - less memory problems than NiCad
Lithium ion	95-100	220	3.5	1000+	12	- difficult to produce multicell packs - most environmentally acceptable - no memory effect - very expensive - cheaper fuel gauges
Alkaline	50	90	1.5	N/A	0.16	- not rechargeable

	Search Keywords
	Hint Category	Power
	Date Created	04-09-96
	Last Updated	06-04-99
	Revision Date	06-04-2000
	Brand	IBM ThinkPad
	Product Family	ThinkPad 300, ThinkPad 310, ThinkPad 315, ThinkPad 340, ThinkPad 345, ThinkPad 350, ThinkPad 355, ThinkPad 360, ThinkPad 365X/XD, ThinkPad 365C/CS, ThinkPad 365CD/CSD, ThinkPad 365E/ED, ThinkPad 370, ThinkPad 380, ThinkPad 380D, ThinkPad 380E, ThinkPad 380ED, ThinkPad 380XD, ThinkPad 380Z, ThinkPad 385D, ThinkPad 385E, ThinkPad 385ED, ThinkPad 385XD, ThinkPad 390, ThinkPad 390E, ThinkPad 400, ThinkPad 500, ThinkPad 510, ThinkPad 560, ThinkPad 560E, ThinkPad 560X, ThinkPad 560Z, ThinkPad 600, ThinkPad 600E, ThinkPad 700, ThinkPad 701, ThinkPad 710, ThinkPad 720, ThinkPad 730, ThinkPad 750, ThinkPad 755C/CS, ThinkPad 755CE/CSE, ThinkPad 755CX, ThinkPad 755CV, ThinkPad 755CD, ThinkPad 755CDV, ThinkPad 760C, ThinkPad 760E, ThinkPad 760CD, ThinkPad 760L/LD, ThinkPad 760ED, ThinkPad 760XD, ThinkPad 760EL/ELD, ThinkPad 760XL, ThinkPad 765L, ThinkPad 765D, ThinkPad 770, ThinkPad 770E/ED, ThinkPad 770X, ThinkPad 770Z, ThinkPad i Series 1400, ThinkPad i Series 172x
	Machine Type	2615, 2600, 2610, 2620, 2618, 2619, 2625, 2624, 9545, 2635, 2636, 2626, 2603, 2604, 2640, 2641, 2645, 2646, 9552, 2630, 2523, 2524, 9546, 9547, 9548, 9549, 9544, 2611, 2627
	Model	Various
	TypeModel
	Retain Tip (if applicable)	N/A
	Reverse Doclinks and Admin Purposes