Groups 51 and 51R Batteries - Dimensions, Features and Recommendations

group 51 batteries mBCI Groups 51 and 51R batteries are very popular automotive starting and dual-purpose batteries, and are ofttimes being used as general-purpose/auxiliary batteries in various applications requiring stable and reliable ability sources.

Although Groups 51 and 51R batteries have their size defined, their size tends to vary a little chip - some manufacturers optimized their batteries for certain applications, and make them slightly smaller (easier fit) or even larger (meliorate performances). So, before ordering a sure model, check the actual size of the battery and the size of your bombardment compartment.

Updated: May fourteen, 2021.

BCI Groups 51 and 51R batteries feature physical dimensions of 9.374 ten five.0625 x 8.8125 inches (23.8 x 12.nine x 22.three cm), or at least very close to these dimensions.

Grouping 51 and 51R are usually made equally vibration resistant Absorptive Drinking glass Mat (AGM) Sealed Lead Acrid (SLA) batteries that may easily fit well-nigh auto bombardment compartments, intended for these batteries.

In social club to fit more easily, some batteries are slightly smaller (as Group U1, for instance, but still labeled as Group 51 batteries), leading to decreased weight, but also smaller capacity, cranking Amps and Reserve Capacity. But, these purposely built batteries are a much better option (they are optimized for certain purpose) for the intended application (Toyota Prius, Mazda Miata, etc.).

Likewise, to help with easier fitting, some batteries are manufactured every bit Group 51 (positive terminal to the LEFT) and as Grouping 51R (positive concluding to the RIGHT).

Anyway, the following tabular array lists some of the nigh popular Grouping 51 and Group 51R batteries, with their nigh important features.

Annotation: Amazon links open up in the new windows, feel free to check them for the virtually up-to-date prices and offers. Also, batteries marked with '*' are slightly wider than 5.0625 inches (12.9 cm) - they actually don't belong to Group 51 or 51R, merely to the Grouping 22NF featuring size of 9.4375 x v.5 10 eight.9375 inches (24 x xiv x 22.vii cm), but they are often labeled as Group 51/51R batteries.

ACDelco ACDB24R Advantage AGM Automotive BCI Grouping 51 Bombardment

acdelco acdb24rACDelco ACDB24R is well balanced and very popular Grouping 51 bombardment, usually used every bit an automotive battery, only it is as well used for other purposes as well.

It may exist used as starting battery and for cycling applications - it features 45Ah nominal capacity, 325 CCA Amps, 390 MCA Amps and lxx minutes Reserve Capacity (RC) and information technology weighs adequate 29.1 pounds (13.2 kg).

ACDelco ACDB24R is also one of the best-rated grouping 51 batteries.

Deka/East Penn 8AMU1R AGM Battery

Deka/East Penn 8AMU1R AGM bombardment is an AGM bombardment intended primarily for starting/cranking applications.

It features 310 CCA Amps, 400 MCA Amps and 'only' 45 RC minutes, just it is very low-cal battery weighing 25 pounds (11.3 kg).

Well designed battery with good ratings.

 Delphi BU9051P MaxStart AGM Battery

Delphi BU9051P is a dual purpose battery featuring 46 Ah nominal capacity, 325 CCA Amps, 390 MCA Amps and 60 RC minutes. Also, it weighs 29.5 pounds (thirteen.4 kg).

Delphi BU9051P is commonly used as an automotive and general-purpose bombardment, simply it is not as pop every bit, for example, ACDelco bombardment.

Optima 8071-167 D51 and Optima 8073-167 D51R YellowTop Dual Purpose Batteries

optima group51 batteries

Optima 8071-167 D51 and Optima 8073-167 D51R YellowTop are premium dual-purpose group 51 and 51R batteries.

They feature spirally wound cells, somewhat smaller 20h capacity of 38 Ah, merely very good 450 CCA Amps, 575 MCA Amps and 66 minutes RC. They weigh 26 pounds (11.eight kg).

Optima 8071-167 D51 and Optima 8073-167 D51R YellowTop are used as automotive batteries, simply they are also used for many other applications. If they are charged with battery charger, be certain to use smart AGM battery charger - this warning goes for all AGM batteries, not just for Optima batteries.

VMAXTANKS SLR60 Solar AGM Battery

vmax slr60

VMAXTANKS SLR60 Solar AGM Battery is deep wheel battery with concrete dimensions of 9.2 ten 5.5 x 8.two - basically, it belongs to the 22NF group.

Nonetheless, information technology is often labeled equally group 51 battery and used interchangeably (if it can fit due to the somewhat larger width).

VMAXTANKS SLR60 bombardment features threescore Ah nominal capacity and 135 minutes Reserve Chapters. It weighs 43 pounds (19.5 kg).

As starting battery, VMAXTANKS SLR60 is not expert - only, information technology is non designed and intended for such applications. Just, every bit deep bicycle battery, it tolerates large number of charging/discharging cycles and is used in cycling applications, including off-the-grid applications (solar, wind turbine battery), kayak trolling motor battery, wheelchair battery and similar.

XS Ability D5100 and XS Ability D5100R XS Series AGM High-Output Batteries

xs power group 51 batteries

XS Power D5100 and XS Power D5100R XS Series are labeled as group 51 and 51R batteries, but they are somewhat larger, featuring dimensions of ix.04 x 5.43 10 8.19 inches - practically, they belong to the Group 22NF batteries.

XS Ability D5100 and XS Power D5100R XS Series are dual-purpose batteries and some of the best-rated batteries that vest to the Group 51/51R (or 22NF) batteries.

They are heavy (39.6 pounds, 18.0 kg), but they also feature 60 Ah nominal capacity, 745 MCA Amps, and 100 RC minutes.

Despite their price (after all, you get what you pay), XS Power D5100 and XS Power D5100R XS Serial are very pop batteries, commonly used equally group 51/51R batteries, if/when they can fit due to their larger width.

Long Story Short: Group 51/51R batteries are designed every bit starting/dual purpose/deep cycle batteries, intended for automotive, solar and other applications.

Note: Amazon affiliate links ('Model' column) open in the new windows, feel free to bank check them for the nearly up-to-appointment prices and offers.

When choosing the right model, be sure to pick the battery according to your own needs and requirements.