WU946 is a Dell laptop battery primarily for the Studio 15 series (models 1535, 1536, 1537, 1555, 1557, 1558 / PP33L / PP39L). It is not the correct/original battery for the Dell Studio 1735 (or 1736/1737).
The Studio 1735 (PP31L) uses different part numbers such as RM791, KM973, MT342, 312-0711, 451-10660, 453-10044, and related variants (6-cell or 9-cell).
This is a rechargeable lithium-ion (Li-ion) “smart” laptop battery pack designed as a direct replacement for the original Dell WU946 (and cross-compatible numbers like MT264, WU960, WU965, KM958, KM904, PW773, 312-0701, etc.). It powers the listed Studio 15 laptops and is widely available as both OEM and third-party replacements.
If you specifically need a battery for the Dell Studio 1735 / 1736 / 1737:
Recommendation: Confirm the exact part number printed on your current battery or check your laptop's Service Tag on Dell's support site before purchasing a replacement. Third-party batteries are widely available and usually work well if they list the correct part numbers and match the physical design.
Standard 6-CellHigher-Capacity OptionsVoltage11.1 V (or 10.8 V)11.1 VCapacity~4400–5200 mAh / ~49–58 Wh~6600–7800 mAh / ~73–87 WhNumber of Cells69ChemistryLithium-ionLithium-ionColorBlackBlackApprox. Dimensions~206–210 × 48 × 20–21 mmLarger (protrudes ~1 inch)Weight~280–330 gHigherCharge Time (approx.)~3 hours (computer off)SimilarOperating Temp.0° to 35°C (32° to 95°F)SameStorage Temp.–40° to 65°CSame
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