SHAOGUAN MEIHUA POWER SOURCE Co., Ltd

This 12V 200AH battery uses AGM (Absorbent Glass Mat) technology. AGM batteries are sealed, maintenance‑free, and offer excellent resistance to vibration and shock. They are ideal for standby applications like alarms and UPS. Gel batteries, on the other hand, use a silica‑thickened electrolyte and are better suited for deep‑cycle applications in extreme temperatures. For most home security and toy applications, AGM is the preferred choice.

What does "4Ah @ 20-hour rate" mean in real-world use?

It means the battery can deliver 0.2 amps continuously for 20 hours before the voltage drops to 3.2V at 25°C. This is the industry standard for rating capacity. In practical terms:

In an alarm system (drawing ~0.1–0.2A), it can provide 10–20 hours of backup.
In a ride‑on toy (drawing ~1.5A), you can expect about 1 hour of continuous play.
Higher discharge currents reduce the total usable capacity – this is normal for all lead‑acid batteries.

What are the float voltage and cycle voltage for this 4V battery?

At 25°C, the recommended voltages are:

Float (standby) use: 4.50V – 4.55V (2.25–2.275V per cell)
Cycle use: 4.85V – 4.90V (2.425–2.45V per cell)
If your ambient temperature differs from 25°C, apply temperature compensation:
Float: –3mV/°C/cell
Cycle: –4mV/°C/cell
Always use a charger designed for sealed lead‑acid batteries with constant‑voltage, current‑limited output.

What is the maximum charging current I should use?

The maximum recommended charging current is 0.9A (based on 0.3C, where C = 3Ah). Exceeding this can overheat the battery and shorten its life. Use a smart charger that limits current to ≤0.9A and switches to constant‑voltage mode once the target voltage is reached.

Product Model Dimensions Overview

MODEL	Rated voltage（V）	Rated capacity（AH）	Dimensions				WEIGHT
			L	W	H	TH	WEIGHT
			MM	MM	MM	MM	KG
4V4AH	4	4.0	47.4	47.3	102	107	0.42
4V4.5AH	4	4.5	47.4	47.3	102	107	0.45
4V5AH	4	5.0	70	47	100	106	0.63
6V1.2AH	6	1.2	97	24	51	56	0.25
6V1.3AH	6	1.3	97	24	51	56	0.28
6V2.8AH	6	2.8	67	33	98	103	0.53
6V3.2AH	6	3.2	125	33	60	66	0.62
6V2AH	6	2.0	70	47	100	106	0.56
6V3AH	6	3.0	70	47	100	106	0.6
6V3.5AH	6	3.5	70	47	100	106	0.62
6V3.8AH	6	3.8	70	47	100	106	0.65
6V4AH	6	4.0	70	47	100	106	0.68
6V4.2AH	6	4.2	70	47	100	106	0.7
6V4.5AH	6	4.5	70	47	100	106	0.72
6V5AH	6	5.0	70	47	100	106	0.75
6V6AH	6	6.0	70	47	100	106	0.78
6V7AH	6	7.0	151	35	93	98	1.05
6V10AH	6	10.0	151	51	94	99	1.5
12V1.2AH	12	1.2	97	43	52	58	0.51
12V1.3AH	12	1.3	97	43	52	58	0.55
12V2.2AH	12	2.2	70	47	98	103	0.71
12V2.6AH	12	2.6	70	47	98	103	0.75
12V2AH	12	2.0	178	35	61	66	0.86
12V2.3AH	12	2.3	178	35	61	66	0.91
12V3AH	12	3.0	134	66	61	66	1.24
12V3.5AH	12	3.5	151	51	92	98	1.4
12V4.5AH	12	4.5	151	51	92	98	1.5
12V5.5AH	12	5.5	151	51	92	98	1.73
12V4AH	12	4.0	90	70	101	106	1.36
12V4.5AH	12	4.5	90	70	101	106	1.42
12V5AH	12	5.0	90	70	101	106	1.5
12V5.5AH	12	5.5	151	65	94	100	1.75
12V6AH	12	6.0	151	65	94	100	2
12V7AH	12	7.0	151	65	94	100	2.08
12V8AH	12	8.0	151	65	94	100	2.2
12V9AH	12	9.0	151	65	94	100	2.35
12V10AH	12	10.0	151	98	97	102	3
12V11AH	12	11.0	151	98	97	102	3.15
12V12AH	12	12.0	151	98	97	102	3.3
12V14AH	12	14.0	151	98	97	102	3.65
12V14AH	12	14.0	181	76	162	167	4.0
12V15AH	12	15.0	181	76	162	167	4.3
12V17AH	12	17.0	181	76	162	167	5.2
12V20AH	12	20.0	181	76	162	167	5.6
12V24AH	12	24.0	165	125	174	174	6.6
12V33AH	12	33.0	194	132	169	169	10.0
12V38AH	12	38.0	197	166	175	175	12.4
12V55AH	12	55.0	229	138	209	215	16.0
12V65AH	12	65.0	350	167	174	179	19.5
12V100AH	12	100.0	330	172	219	224	28.0
12V120AH	12	120.0	406	177	220	225	34.0
12V150AH	12	150.0	483	170	237	242	40.0
12V200AH	12	200.0	521	238	218	223	58.0
12V250AH	12	250.0	519	267	219	219	70.0
24V5AH	24	5.0	137	91	101	106	3.9
24V7AH	24	7.0	188	102	95	101	4.1
24V12AH	24	12.0	192	151	93	99	6.8
24V14AH	24	14.0	192	151	93	99	7.3

🔄 Compatibility & Replacement

Can I replace my 4V 2.5Ah battery with a 6V 1.3Ah battery?

No, absolutely not. You cannot replace a 4V battery with a 6V battery. Here's why:
Voltage must match exactly. Your device is designed to operate at 4V. Connecting a 6V battery will:

Immediately damage sensitive electronic components

Cause overheating in motors and circuits

Create a fire hazard in some cases

Void any warranty on your equipment

Will this battery work in my [Honeywell / DSC / Ademco] alarm system?

This 4V 4AH battery is a direct replacement for many leading alarm panels, including:

Honeywell (Ademco) models: 4V/2.5Ah, 4V/4Ah
DSC models: 4V/2.5Ah, 4V/3Ah
Interlogix / GE
To be sure, check the original battery’s model number (e.g., PC4‑3, NP4‑3, etc.) or the voltage/capacity printed on it. If you’re unsure, contact us with your equipment model.

My device uses four batteries connected together. Can I replace just one?

We strongly recommend replacing all batteries in a series set at the same time. Mixing a new battery with old ones will cause the new battery to be over‑discharged and rapidly fail, leading to poor performance and potential leakage. Save yourself the hassle and replace the full set.

Why is it important to replace all batteries in a bank at once?

In series or parallel banks, older batteries have higher internal resistance and lower capacity. When mixed with new ones:

The new battery compensates for the weak one, leading to overcharging of the new and undercharging of the old
Overall capacity is limited by the weakest battery
The entire bank fails sooner
Replacing all at once ensures even charging and maximizes lifespan.

Can I use a VRLA battery in my child’s ride‑on toy?

Yes, as long as the voltage matches and the battery fits. Many ride‑on toys use 4V, 6V, or 12V sealed lead‑acid batteries. Our VRLA batteries are a perfect fit for these applications. For longer playtime, you can often upgrade to a higher Ah capacity if space permits. However, avoid using batteries with very high discharge rates (e.g., starter batteries) in toys, as they may not be designed for frequent deep cycling.

🔧Usage & Maintenance

How long will this battery last on a single charge?

Runtime depends entirely on the device’s current draw. Examples:

Alarm system (standby): 10–20 hours
Ride‑on toy (~1.5A): about 1 hour
Emergency light (~0.3A): 5–8 hours

You can estimate by dividing 3Ah by your device’s average current (in amps). Remember that at higher currents, the effective capacity is lower.

How many years does this battery last before needing replacement?

In float service (e.g., always connected to a charger in an alarm system), expect 3–5 years of life. In cyclic use (e.g., toys that are charged after each use), the battery can deliver 300–500 charge/discharge cycles. High temperatures, frequent deep discharges, and improper charging will shorten its life.

How should I store this battery when not in use?

Follow these storage tips:

Store in a cool, dry place (ideal 20–25°C / 68–77°F).
Fully charge the battery before storage.
Recharge every 3–6 months to prevent sulfation.
Never store a discharged battery – it will permanently lose capacity.

My battery is swollen / bloated. What should I do?

Stop using it immediately and disconnect it from the device. Swelling is usually caused by overcharging or excessive heat (thermal runaway). Do not attempt to charge or use a swollen battery – it is a safety risk. Dispose of it properly at a recycling center and replace it with a new one.

Can I use a regular car battery charger to charge this 4V battery?

Never use a car charger. Car chargers deliver high current (often 10A+) and are designed for large starter batteries. They will overheat and destroy this small 4V battery, and may even cause a fire. You need a smart charger specifically for small sealed lead‑acid batteries, with output ≤0.9A and proper 4V charging profile.

About us: SHAOGUAN MEIHUA POWER SOURCE Co., Ltd. It is a production-oriented high-tech enterprise mainly engaged in the R D, production and sales of lead-acid batteries.

Contact Us: Industrial Transfer Park, Renhua County, Guangdong Province，China; sales@meihuabattery.com; 0751-6426286 <i style="color:#ffffff;margin-left: 10px;" class="iconfont icon_tel icon-a-whatsapp1"></i> +86-13316954882

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