The original battery is NiMH and appears to have a voltage of 4.8v. That would work out to 4 cells, because NiMH nominal voltage per cell is 1.2v. This also tracks well with the OEM charger, which uses 5.6v for charging (1.4v per cell), which is the generally recommended trickle-charging voltage for NiMH.

Can be powered from 4xAA. The OEM 6xAA included a step-down converter. Source. There is also a picture on this page:

Untitled

OEM replacements such as H240AE-4GW are 3800mAh.

Battery for Handbook has various modem numbers:

HB4BATTPACK
H240AE-4GW
HB4BATT2500

Battery also has an LED that shines through window on laptop to indicate when charging.

Battery Pinout

Appears that pin closest to the release latch (farthest from the “notch”) is positive (see image from Jeff B below), and one closest to the “notch” is negative (tone’d from thick traces on memory connector):

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A/C Adapter

Adapter socket was on the battery itself, there is no power connector on the computer.

Power adapter P/N: hbkacadapter

Uses funky connector, This is the pinout of the AC connector looking at the cord NOT THE LAPTOP! (the diagram is also on the AC adapter):

[https://www.reddit.com/r/vintagecomputing/comments/ekam2x/looking_for_ac_adapter_for_a_gateway_2000/](https://www.reddit.com/r/vintagecomputing/comments/ekam2x/looking_for_ac_adapter_for_a_gateway_2000/)

https://www.reddit.com/r/vintagecomputing/comments/ekam2x/looking_for_ac_adapter_for_a_gateway_2000/

Parallel Port Pinout

From Linux on my Handbook 486 (angelfire.com)

Parallel Connector	Handbook Connector
1	2
2	14
3	28
4	27
5	12
6	11
7	25
8	24
9	9
10	6
11	22
12	16
13	7
14	15
15	18
16	5
17	3
18	13
19	13
20	10
21	10
22	8
23	8
24	1
25	1
26	?

Connector

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Honda PCR-E28FS Connector is now manufactured by Misumi.

Other compatible Honda connectors (according to a data sheet):

PCR-E28F{cableSize}+ - “Cable-side IDC type female connector”. {cableSize} can be: F, 0.8-1.0mm FA, 0.5-0.65mm. FB, 0.5-0.65mm. FC, 1.0mm loose. FD, 1.0mm flat. FH, 0.35-0.5mm loose. FJ, 0.65-0.8mm loose. FK, 0.65-0.8mm loose.

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PCR-E28FS+ - “Cable-side soldering type female connector”, Verical $6/ea min qty 11.

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PCR-S28FS+ - “Cable-side soldering type female connector”, chip1stop $9/ea, no min order

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PCR-28LFD{boardLock}+ - “Right angle through hole type female connector for PCB”, will require shaving of locator pins. {boardLock} can be K, kink formed contacts, or T, board lock pins.

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PCR-28FD{boardLock}+ - “Straight through through hole type female connector for PCB”, will require shaving of locator pins .{boardLock} can be K, kink formed contacts, or T, board lock pins.

Untitled

Similar to Hirose DX10-28S (digikey, mouser, corestaff, chip1stop) (has clips), DX10A-28S (digikey, mouser) (has screws), DX30A-28P, DX31A-28P, but the gender is reversed! Also, might be discontinued?

Looks a lot like an MDR26 connector, but don’t be fooled! We need 28 pins!

An SCA-80 SCSI connector might work, if cut down.

Fanuc (Industrial Automation) uses PCR connectors for servos, but they appear to be 20-pin connectors mostly.

Floppy Drive

Various model numbers. But it all depends on the CONNECTOR as above.

HB4EXTFLPY (FCC ID DX9FD-05P, same as so many other drives)
- Manufactured by TEAC, shows part number FD-05P or FD-05P2
FDD144001AAWW (FCC ID GSU3T5PRS-2)
- Looks same as Thinkpad Floppy FDD-101.
IBM FD-05P2, P/N: 05k9858 (fru) 05k8989
Toshiba PA2669U (same basically as IBM)
Toshiba PA2611U Attachment Case (Wrong Gender)

[https://www.ebay.com/itm/266243363608](https://www.ebay.com/itm/266243363608)

https://www.ebay.com/itm/266243363608

[https://www.ebay.com/itm/266243363608](https://www.ebay.com/itm/266243363608)

https://www.ebay.com/itm/266243363608

Parallel Connector	Handbook Connector
1	2
2	14
3	28
4	27
5	12
6	11
7	25
8	24
9	9
10	6
11	22
12	16
13	7
14	15
15	18
16	5
17	3
18	13
19	13
20	10
21	10
22	8
23	8
24	1
25	1
26	?

Parallel Connector	Handbook Connector
1	2
2	14
3	28
4	27
5	12
6	11
7	25
8	24
9	9
10	6
11	22
12	16
13	7
14	15
15	18
16	5
17	3
18	13
19	13
20	10
21	10
22	8
23	8
24	1
25	1
26	?

Parallel Connector	Handbook Connector
1	2
2	14
3	28
4	27
5	12
6	11
7	25
8	24
9	9
10	6
11	22
12	16
13	7
14	15
15	18
16	5
17	3
18	13
19	13
20	10
21	10
22	8
23	8
24	1
25	1
26	?