31M-825 12V105AH BCI Dual-Purpose Marine Battery

Model

31M-825

Nominal Voltage

12V

Nominal Capacity(20HR)

105Ah

Dimension

Length

330±2mm(12.99inches)

Width

173±2mm(6.81inches)

Container Height

212±2mm(8.35inches)

Total Height(with Terminal)

237±2mm(9.33inches)

Weight With Acid

Approx 30.6Kg(67.47lbs)

Acid

1.280±0.015g/cm (25ºC)

Standard Terminal

Cell layout

Hold-Down

Case

Black-Material (PP)

Cover

Black-Material (PP)

Handle

Black-Material (PP)

Rated Capacity

@20 hour rate(5.25A)

105Ah

Reserve Capacity (RC)

[email protected]

200min

Cold Cranking Amps(CCA)

@0 ºF (-18 ºC)

825A

Terminal Type

Positive

Negative

19.5

17.9

Wet Starter Dual Purpose AGM Battery BCI Standard Series

Model	Rated Voltage(V)	20hr @1.75V/cell	RC (min)	CCA -18℃(A)	L(mm) +0/-2	W(mm) +0/-2	H(mm) +0/-3	TH(mm) +0/-3	Gross Weight(kg)	Cell layout	Terminal	Hold-Down	Handle
24M-550	12	79	150	550	260	168	208±2	233±2	23.0	1	12	B0	TS7
27M-580	12	92	175	580	306	168	208±2	233±2	27.0	1	12	B0	TS7
27M-700	12	92	200	800	306	168	208±2	231.5±2	28.5	1	12	B0	TS7
31M-720	12	105	200	720	330	173	212±2	235.5±2	29.8	1	12	B0	TS7
31M-825	12	105	200	825	330	173	212±2	235.5±2	30.6	1	12	B0	TS7
34M-800	12	62	125	800	275	171	200±2	235.5±2	21.6	1	12	B0	TS7
S34B20R	12	27	47	270	197	128	227	227	10.5	1	12	B0	TS7
S46B24R	12	45	68	325	238	128	227	227	13.5	1	12	B0	TS7
S55D23R	12	50	85	550	220	170	225	225	15.1	1	12	B0	TS7
S65D26L	12	68	125	400	257	171	227	227	17.3	1	12	B0	TS7
S75D31L	12	80	125	510	304	171	227	227	20.7	1	12	B0	TS7

Model

Rated Voltage(V)

20hr @1.75V/cell

RC (min)

CCA -18℃(A)

L(mm) +0/-2

W(mm) +0/-2

H(mm) +0/-3

TH(mm) +0/-3

Gross Weight(kg)

Cell layout

Terminal

Hold-Down

Handle

24M-550

150

550

260

168

208±2

233±2

23.0

TS7

27M-580

175

580

306

168

208±2

233±2

27.0

TS7

27M-700

200

800

306

168

208±2

231.5±2

28.5

TS7

31M-720

105

200

720

330

173

212±2

235.5±2

29.8

TS7

31M-825

105

200

825

330

173

212±2

235.5±2

30.6

TS7

34M-800

125

800

275

171

200±2

235.5±2

21.6

TS7

S34B20R

270

197

128

227

10.5

TS7

S46B24R

325

238

128

227

13.5

TS7

S55D23R

550

220

170

225

15.1

TS7

S65D26L

125

400

257

171

227

17.3

TS7

S75D31L

125

510

304

171

227

20.7

TS7

FAQ

1. 31M-825 AGM Battery for Marine & RV Application

Up to twice the life of a standard flooded battery.

A starting power at low state of charge and low temperature.

Longer life in high temperature environments.

Spill proof which allows it to be mounted anywhere.

Maintenance free and vibration resistant.

Faster recharge and more cycles.

2. How to extend the life of a SMF battery?

In order to increase the life of battery, it is necessary to monitor the battery performance constantly. Here are some tips to optimize the battery performance.
1. The SMF battery should be placed in well ventilated area to avoid high temperature environment. With each 10 degree rise in air temperature, the float life reduces to half. If the battery is installed in equipment, it is necessary to isolate it from heat generating components like transformer.
2. In order to prevent deep discharge, it is necessary to set the cut off voltage to 11.5 volts in 12 volt battery and 4.5 in 6 volt battery.
3. It is necessary to prevent no load battery drain. The additional components of the equipment such as sensors, displays and indicators consume power in the no load condition. So if the equipment is not provided with automatic charging, this power loss leads to deep discharge.4. Boost cum float charging is suitable for SMF battery. If the power failure is frequent, the battery should be charged immediately to acquire full charge before the next power failure.

5. If there is any problem such as low backup time, battery heating, low terminal voltage even after continuous charging develops, the battery should be attended immediately.

6. If the equipment is not using for long time, it should be charged once in every week. If the battery is allowed to charge and discharge frequently, its life can be extended to 3-5 years.

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