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Emergency service vehicles, power when you need it most.

Power when it’s needed most

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Fit and forget for a decade!

Industry first 10 year warranty

A fast and powerful response

In an emergency situation, there is no room for error and only the most reliable equipment will suffice. Transporter Energy Lithium Iron Phosphate (LiFePO4) batteries are manufactured to the highest possible standards resulting in a durable and robust product which can be relied upon to perform in even the most challenging circumstances.

Power that meets your demands

Specialist and emergency vehicles often need to have internal systems running while the engine is switched off which can put significant demand on batteries.

Our Lithium Iron Phosphate batteries can deliver up to 400% more power than traditional batteries, giving you peace of mind that they will perform when you need them most. They have an 80-100% usable energy cycle; up to 50% more usable capacity than some lead acid batteries, and deliver a constant power supply throughout.

Military vehicle

Faster charging time

We know that it is essential to keep emergency vehicles on the road as much as possible. Reported cases of ambulances not being available for shifts because the batteries could not be charged quickly enough are cause for alarm.

Transporter Energy LiFePO4 batteries can be charged up to 20 times faster than traditional lead acid batteries, meaning that vehicles are back on the road more quickly. Plus, with a life cycle of around 5,000 charges, maintenance is kept to a minimum.

Emergency service vehicles

Making light of delivering power

With so much essential equipment on board, weight is a vital consideration. We've worked with an operator which was forced to remove vital operational equipment in order to comply with weight limits.

Their power supply came from three batteries weighing 36kg each. These were replaced with three Lithium Iron Phosphate batteries weighing just 13kg each and delivering more than twice the power, leaving more weight capapcity for life-saving equipment.

A paramedic helping a patient

4 x the Power, 60% Lighter.

Up to 60% lighter and four times as powerful as lead acid batteries, our LiFePO4 batteries are powerful enough to run vital applications including all on-board medical equipment and auxiliary devices such as flood lights and tail lifts.

With a life-span of around 13 years downtime for maintenance is minimal, so your vehicles remain in service for more of the time.

A paramedic pushing a patient towards an ambulance

Keeping you in action for longer

Below is a comparison between a leading AGM and our Lithium Iron Phosphate LifePo4 we have chosen to compare with the this as it seems to be the most commonly used battery within the Ambulance Service.

We have quoted figures from the manufacturers own website however from the conversations with Ambulance Service technicians and Ambulance builders that the AGM batteries are regularly needing to be change well before the quoted life expectancy. This is due to the heavy demands, lack of proper re-charging, maintenance and care that is required with Lead / AGM.

It is a known and documented fact, even by the manufacturers themselves that these batteries will seriously degrade reducing performance, capability and lifespan if regularly taken below 50% Depth of Discharge.

A paramedic pushing a patient towards an ambulance

Lithium Iron batteries

  • Increase payload, LiFeO4 batteries weigh only 13KG
  • Over 90% charge if Lithium is left for 1 year
  • Lithium can be fitted anywhere in any orientation to save space and for ease of fitment.
  • With Lithium there is no risk of overcharging issues and it will not emit toxic explosive gases, swell or explode.
  • Lithium can run totally flat and recharge. The Battery Management System in Lithium will kick in and protect itself before damage occurs.
  • Lithium maintains a stable voltage right down to almost zero, keeping your appliances running.
  • Lithium has a straight power curve until flat.
  • Lithium has much faster charging time, up to 20 times faster.

Lead / AGM Batteries

  • XAverage AGM / Lead Acid weighs 24-31KG
  • XLead / AGM will go flat if left for long periods of time.
  • XLead / AGM must be fitted upright with access to a vent.
  • XLead / AGM batteries are dangerous when they are overcharged.
  • XLead / AGM is taken below 12 volts your appliances will start turning off, including TV’s, fridges, heating, control panels, etc.
  • XLead / AGM will be destroyed if allowed to go flat. Below 10.5V they are unrecoverable.
  • XLead / AGM have an ever decreasing power curve.
  • XLead / AGM are relatively slow to charge.
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We know from the suppliers and technicians in the service that these AGM batteries are being routinely swapped out multiple times in one year. If we were to factor this into our comparison table the savings of diagnosis, labour, downtime and AGM battery replacement cost would be astronomical.

We have calculated that on average most Ambulance Service high demand cycling are only getting approximately 100 cycles which equates to 45 x less Amp Hours than Lithium. Also to be taken into account on a critical lifesaving vehicle is the cost of the downtime that is required to charge, maintain and replace inferior batteries.

In summary, our Lithium batteries are between 7.5 times and 45 times cheaper than Lead or AGM.

A paramedic pushing a patient towards an ambulance


Our safe, efficient and environmentally friendly batteries are lightweight and have a wide variety of applications. From powering your leisure activities to providing essential backup for critical power supplies, they keep you running when you need it most. Simple to use and with a 5,000-cycle lifespan, lithium-ion batteries are revolutionising the way we use power. All our batteries are also CE and GOV UK Approved, so you know it’s reliable.

A fire engine turnng at a cobbled road junction with 10 years warranty badge in corner of photograph

Charge Cycles

To match the amount of charge cycles from lead to lithium you need a lot of batteries.

What is a charge cycle? A charge cycle is the process of charge and discharging a battery. The term is typically used to specify a battery's expected life

Usable power comparison

This demonstrates the power you can actually use to power your appliances

Appliances such as TVs, LED lights, satellite systems, heating controls, inverters etc. require stable voltage above 12 volts to operate. Lithium iron phosphate battery voltage remains stable right to the very end. Lead Acid, AGM and GEL does not!

Everything working functionally

Below here - Equipment starts to fail and turn off.

Danger - The battery is being severely damaged.

Permanent Damage - Replace battery. Unrecoverable.

Lead acid

100% 12.70v
90% 12.60v
80% 12.42v
70% 12.34v
60% 12.15v
50% 11.96v
40% 11.82v
30% 11.65v
20% 11.39v
10% 10.94v


100% 12.80v
90% 12.65v
80% 12.50v
70% 12.37v
60% 12.27v
50% 12.01v
40% 11.81v
30% 11.66v
20% 11.12v
10% 10.50v


100% 14.40v
90% 13.40v
80% 13.30v
70% 13.25v
60% 13.20v
50% 13.10v
40% 13.10v
30% 13.00v
20% 12.90v
10% 12.00v

Lead and AGM manufacturers quote: "At 12 volts there is a tipping point where the voltage goes from relatively constant to plumeting rapidly"

Total AMP Hour Comparison

Also, at 50% DoD the voltage will not be sufficient to run anything other than old style lights. LED lights, TVs, satellites, heating systems, power inverters, fridges and other such like appliances, cannot usually be powered below 10 volts.

Please note: if a lead acid battery is taken below 50% DoD this will severely damage the battery. This does not affect lithium iron phosphate batteries in anyway.