This is a bad idea, the capacity of the single cell dominates, the energy in the double cell will be unusable.

 

This sounds like a Homework question. Is it?

 

Welcome to AAC!

You have 2 batteries in parallel in series with the 3rd. There's no valid reason for doing that.

 

View attachment 324021

Is there a better way of doing this.
Thank You

Could you show me a Diagram, Please

 

Is there a better way of doing this.
Thank You

Could you show me a Diagram, Please

It is to power 6 3watt led lights with a voltage of 3.3 volts each
I want to double the current to keep the batteries in longer

 

Not gonna happen with 3 AA batteries.

A 3 watt LED with Vf = 3.3v will draw nearly 1 amp. 6 such LEDs will draw almost 6 amps.

Here's the discharge curve for a alkaline AA battery. What's the service life at 6 amps?

 

It is to power 6 3watt led lights with a voltage of 3.3 volts each

How are the LEDs connected?

I want to double the current to keep the batteries in longer

You need 4 AA batteries in a 2s2p configuration.

Personally, I'd use Li-ion batteries.

 

How are the LEDs connected?
You need 4 AA batteries in a 2s2p configuration.

Personally, I'd use Li-ion batteries.

The LEDs will be each connected in parallel

 

The LEDs will be each connected in parallel

Each with their own current limiting resistor?

The nominal voltage of a Li-ion battery is 4.2V. You can run them down to around 3.5V. Typical capacity is about 2Ah for 18650's. If you go that route, be mindful of counterfeits.

 

Each with their own current limiting resistor?

The nominal voltage of a Li-ion battery is 4.2V. You can run them down to around 3.5V. Typical capacity is about 2Ah for 18650's. If you go that route, be mindful of counterfeits.

Thank You, Sir

It is for a rectangle box light fixture I am making

 

It is for a rectangle box light fixture I am making

If space is an issue, 18500's are closer to the length of AA batteries. Available capacity is closer to 1.5Ah.

 

You cannot get 3.3V form two AA in series. The best configuration of 3AA batteries is three in series giving you 4.5V.

And, as others have pointed out, you will mot get 6A from that for more than a few minutes, if ever.

How long do the batteries need to last?