Optima Red Top Reversed Battery RTR 4.2 (8003-251)

Optima Red Top Reversed Battery RTR 4.2 (8003-251)

Optima Batteries


Home Delivered

 In Stock

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This battery is not suitable for Start-Stop vehicles

Optima Red Top Reversed Battery RTR 4.2 (8003-251)

For agricultural use, where machinery is used seasonally, the OPTIMA® RedTop® shows its outstanding starting capacity. Even if the battery has been left out in the tractor or harvester over the winter, the RedTop® will provide starting power the first time.* The key to the RedTop’s® remarkable starting power is OPTIMA’s® Spiralcell® Technology.

*The battery should be disconnected during extended periods of non-use.

This makes it possible to start heavy diesel engines with a battery, as compact as an ordinary automobile battery, which can be mounted in areas with very little space. This powerful package also shows unparalleled resistance to vibration, knocks and bumps. The RedTop’s® robust, leak free construction stands up to the toughest conditions, without power interruption.


  • 2 to 4 times longer life
  • 3 to 4 times longer storage time (shelf life)
  • No corrosion to terminals, cables, & battery trays.
  • Zero maintenance, sealed design eliminates water loss. Greatly reduced risk of a battery explosion
  • Fifteen times more vibration resistant
  • Highest power density (more power per pound)
  • Can be recharged rapidly
  • Non spillable – can be mounted in any orientation.
  • Flat discharge profile (Higher average voltage during discharge provides longer run time over a larger portion of battery capacity)


  • Voltage: 12V
  • Capacity: 50 Ah
  • CCA (EN): 815 A
  • Length: 254mm
  • Width: 175mm 
  • Height: 200mm 
  • MPN: RTR4.2

Unsure about which battery to buy? Please call us on 0808 164 9361

Delivery of your order is by courier and will be dispatched same day whenever possible provided the order is received by us before 14:00 excluding weekends.

All Pet Products need to be ordered before 11am to be eligible for next day delivery.

Delivery is free for orders over £50 (excluding car batteries) and £4.99 for next day delivery. Standard delivery is £3.30 for all other orders with a few exceptions for some postcodes* and for some very heavy or very large products. The shipping costs for these can be found at checkout.

All batteries incur a £7.99 shipping cost.

Some items are flagged as being available to order. In these cases we will either have the product sent direct to you from our suppliers or they will be sent to us to forward on to you. In some cases this can take up to five working days from receipt of your order. If deliveries are to be delayed for any reason a customer service representative will get in touch with you to let you know and agree how you wish to proceed.

Should your order not arrive please contact us on 0808 164 9361 as soon as you feel your product is late and we will do everything we can to help.

Postcode Exclusions:

  • Scottish Highlands - AB36-38, AB55-56, FK17-21, IV1-39, IV52-54, IV63, KW1-14, PA21-40, PH19-26, PH30-41, PH49-50
  • Scottish Islands - HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3

Avoid trailing cables and unlock certain features by having the RAC Shop professional install your in car technology product for you.

Following your purchase online a customer services representative will contact you to discuss your fitting time and location and then an engineer will attend your home or place of work, or indeed wherever your car happens to be to fit your tech product for you.

Many dash cams have enhanced functionality when hard wired, so that as well as looking far superior in your car it will be able to enter parking mode to record your vehicle even when you are away and the car is stationary (note this feature is not available on all cameras -see descriptions for details).

Fitting will usually take around 1 - 2 hours for dash cams and 2-4 hours for parking sensors.

If you have any questions about our technology fitting service, please contact us 0808 164 9361.

Should you wish to return your item, please fill in the form located here you will then be sent a RMA number and an address to send your product.

Faulty products will be replaced as soon as we are able to verify the fault and ship another to you. For items you simply want to return within 14 days of purchase for a refund, a refund will be issued to the card you paid with within 7 days of the item being received by the RAC shop.

Please note items sent back without an RMA number generated by our online returns form may take significantly longer to process. Items being returned after 14 days may carry a restocking fee - please contact us on 0808 164 9361 for more information and to discuss your return.

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† Prices depend on the age, value and model of vehicle.

* It is £4.99 for next day delivery, however orders must be placed before 2pm.

Standard delivery takes 3-5 days and costs £3.49.

All orders over £50 inclusive of VAT qualify for free standard delivery.

All home delivery batteries have a carriage cost of £7.99. Delivery takes 1-3 working days.

For customised orders, please allow 5-7 days.