Claim entire amount v/s depreciation limit?

Say I bought a Laptop/Mobile/tablet used for trading during the financial year, return yet to be filled. Do I claim the whole amount or only depreciation limit?

You can claim depreciation @40% on computer/ laptop if purchased before 40th September else claim half of it.

what i understand from above comment is if bought after 31st March to 30th September? - 40% and anywhere in between the FY - 50%?
and we claim remaining 50% next year?

It’s like this if you have purchased laptop till 10000 before September depreciation will be 4000 and after September it will be 2000. Next year you can claim again on balance after depreciation ie on 6000 or 8000 *40%