Optima Blue Top Battery BT Slim 4.2 (8006-252) (BCI 34M) BTSLIM4.2 AGM
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Our recommended replacement is below.
Optima Blue Top Battery BT DCM 4.2 (8016-253) (BCI D34M) BTDCM4.2 AGM
Technical Specification
Customer Rating |
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4.7 From 22 Reviews |
Terminals | ![]() ![]() |
Brand | Optima |
Range | Optima Blue Top |
Voltage | 12 Volts |
Technology | AGM |
Capacity (C20) | 50 Ah |
CCA (EN) | 815 A |
Length | 254 mm |
Width | 175 mm |
Height inc. terms | 200 mm |
Guarantee | 1 Year |
Barcode (EAN) | 4016987113493 |
Product Videos
View AllLatest Customer Reviews
Boat battery, did the jon
5
SK - Holyhead, United Kingdom -

No problems
5
RA - London, United Kingdom -

Speedy on time delivery.
5
NI - Cheddar, United Kingdom -

The Battery works as it should, but the stars all 5 should go to TAYNA , I live and work in remote Scottish Highlands where this sort of product is often not available due to our remoteness. TAYNA has supplied me many times with all sorts of batteries marine, truck, quads, motorcycle, and car. Their range and choice is amazing cople this with the supper fast delivery is 5 star every time thankyou TAYNA. Regards Andy from Ardnamurchan
5
aj - Acharacle, United Kingdom -

Great battery replacing similar bought in 2011
5
MT - Bridport, United Kingdom -

Description
BTSLIM4.2 Optima Spiral-Cell Blue Top AGM Battery
Optima Batteries based in the USA have over 40 years experience in the battery sector. Used extensively across the globe, providing extreme performance and power across a broad range of applications. Using the very latest SpiralCell technology, originally used in the lunar rovers! Optima Batteries benefit from being completely sealed so no maintenance is required, low self-discharge rate for longer shelf life, fast electronic load reserve- ideal for electric winches, auxiliary systems etc-, universal size to fit many many applications from auto, mobility, ups and more, vibration resistance, faster charging times, resistant to extreme temperatures and high cranking power.
AGM Technology (Absorbent Glass Mat)
Compared to flooded batteries AGM batteries are dry celled with the positive and negative plates separated by an absorbent glass mat that holds the electrolyte like a sponge. This minimises electrolyte spillage. OPTIMA AGM batteries use a higher purity of lead compared to other AGM batteries on the market, this extends battery life and increases performance for example; superior starting power, the ability to recharge much faster, higher charge acceptance and shock/vibration resistant. Optima Batteries can be used in a vast range of applications from industrial, agricultural, commercial, marine, auto, ICE, mobility and golf with their easy recognisable colour coded ranges:
Optima Blue Top
The Blue Top battery is a combination of starter and deep cycle technology ideal for the marine applications.
Maintenance Free
1 Year Warranty
Other References: BCI 34M, 8006-252
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