Đèn pin và pin dự phòng ở trong giỏ.

Vietnamese often does not use a separate verb equivalent to English is/are for location.

Here, ở does that job. It means to be at / to be located at.

So:

• Đèn pin và pin dự phòng = the flashlight and the spare battery/batteries
• ở trong giỏ = are in the basket

So the whole sentence works very naturally without a separate word for are.

Ở marks location: at / in / located at.
Trong means inside.

Together, ở trong means to be inside or to be in.

So ở trong giỏ means in the basket or more literally located inside the basket.

In many cases, Vietnamese can also shorten this and just use trong giỏ if the context is clear. But ở trong is very normal and clear.

Because pin means battery.

• đèn pin literally looks like battery lamp
• but as a fixed expression, it means flashlight (or torch in British English)

Then in pin dự phòng:

• pin = battery
• dự phòng = backup / spare / reserve

So pin dự phòng means spare battery or backup battery.

Even though pin appears twice, the two parts are doing different jobs:

• in đèn pin, it is part of a set noun
• in pin dự phòng, it keeps its basic meaning of battery

By itself, Vietnamese usually does not mark singular vs. plural as clearly as English does.

So pin dự phòng could mean:

• a spare battery
• spare batteries
• sometimes even a backup battery pack, depending on context

You normally learn the exact number from context.

If the speaker wants to be specific, they can add a number or another word, for example:

• một cục pin dự phòng = one spare battery
• hai cục pin dự phòng = two spare batteries
• những cục pin dự phòng = spare batteries

Vietnamese does not have articles like English a/an/the.

That means nouns like đèn pin, pin dự phòng, and giỏ can appear without any article.

Whether the meaning is:

• a flashlight
• the flashlight
• flashlights in general

depends on context.

If Vietnamese wants to be more specific, it often uses:

• demonstratives such as này, đó, kia
• numbers
• classifiers

For example:

• cái đèn pin đó = that flashlight
• một cái giỏ = a basket

Not necessarily.

In Vietnamese, classifiers are often used when you have:

• a number
• a demonstrative
• a more specific reference to an individual object

But in a simple statement like this, leaving them out is completely natural.

If you wanted to include them, you might say something like:

• cái đèn pin for flashlight
• cục pin for battery

So a more explicit version could be:

• Cái đèn pin và cục pin dự phòng ở trong giỏ.

But the original sentence without classifiers is also fine and natural.

Và means and.

It joins the two noun phrases:

• đèn pin
• pin dự phòng

So:

• Đèn pin và pin dự phòng = the flashlight and the spare battery/batteries

It is the standard neutral word for and in Vietnamese.

Mostly yes.

The sentence is structured like this:

• Đèn pin và pin dự phòng = subject/topic
• ở trong giỏ = location

So it follows a pattern similar to English:

• The flashlight and the spare batteries are in the basket.

Vietnamese often puts the thing being talked about first, then says where it is.

Yes, and that is also very natural.

The difference is mainly in focus:

• Đèn pin và pin dự phòng ở trong giỏ.
  Focuses first on the flashlight and spare battery/batteries, then tells you where they are.

• Trong giỏ có đèn pin và pin dự phòng.
  Focuses first on the basket, and then says what is inside it.

The second pattern uses có, which means something like there is/there are.

So both are correct, but they highlight different parts of the information.

Not always.

In modern Vietnamese, power bank is very often called:

• sạc dự phòng
• cục sạc dự phòng

Meanwhile, pin dự phòng more literally suggests a backup battery or spare battery.

So if the meaning shown to you is power bank, that may depend on context, but many speakers would more commonly say sạc dự phòng for that specific device.

If the meaning is spare battery, then pin dự phòng fits very well.

Giỏ means basket.

It usually refers to a handled basket or a basket-like container. Depending on context, English might translate it as:

• basket
• sometimes carrier basket
• occasionally something similar, if the object is basket-shaped

So ở trong giỏ simply means in the basket.

You would usually add classifiers and demonstratives.

For example:

• Cái đèn pin đó và những cục pin dự phòng đó ở trong giỏ.

Roughly:

• cái đèn pin đó = that flashlight
• những cục pin dự phòng đó = those spare batteries
• ở trong giỏ = are in the basket

The original sentence is more neutral and leaves more to context, which is very common in Vietnamese.