Dell D505 M20 battery pack, 11.1 V Li-ion, 4400 mAh, laptop.
Replacement Dell Latitude D505 and mobile workstation Precision M20 battery pack, rechargeable lithium-ion 4400mAh laptop batteries at low prices.

Charge your new compatible laptop Dell D505 M20 battery fully when you receive it and before first use. If you are not using your battery for extended periods, charge it every 6 weeks. If you leave your battery on charge 24 hours a day while using your laptop, you can greatly shorten its expected lifespan.

• Dell D505 battery
• Dell M20 battery

They will also fit:
Inspiron 500m, 510m, 600m
Latitude d500, d510, D520 D600 D610
Mobile Workstation and Precision M20.

This 11.1V battery will replace quite a few battery serial codes. We have listed most of them here for your convenience:
3R305
BAT1194
1X793
312-0068
315-0084
G2053A01
J2178
U1544
W1605
YD165
0X217
310-4482
310-5195
312-0191
312-0309
312-0408
451-10132
451-10194
4P894
6Y270
C1295

Battery chemistry Type - Li-ion
Voltage - 11.1-volt
Capacity 4400mAh or 4.4Ah
Colour of the casing is Metallic Silver.

The physical size of this Dell D505 and M20 battery replacement is as follows:
Length = 127.4mm
Width = 77.4
Height = 19.4mm