The Coleman CPX 6 XL Lantern is powered by a 4V sealed lead-acid (SLA) battery, typically rated at 4Ah. Designed for durability and deep-cycle performance, this maintenance-free battery provides 30+ hours of runtime on low mode. Replacement packs (e.g., Coleman part # 4-AA) must match the original 100×35×60mm dimensions to fit the base compartment. Charging requires a 4V 500mA AC adapter.
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What type of battery does the Coleman CPX 6 XL use?
The lantern relies on a 4V SLA battery with ABS casing and valve-regulated spillproof design. Key advantages include low self-discharge (3%/month) and 200+ full cycles. Unlike lithium alternatives, SLA handles irregular charging better, making it ideal for seasonal camping gear storage. Pro Tip: Store the battery at 50% charge during offseason to prevent sulfation.
The SLA chemistry uses lead plates immersed in sulfuric acid gel, delivering stable 4V output until 80% depth-of-discharge (DOD). Technically, these batteries tolerate -15°C to 40°C but lose 30% capacity in freezing conditions. For example, a fully charged 4Ah unit powers the CPX 6 XL’s 100-lumen high mode for 7 hours—plenty for overnight fishing trips. Transitional phases between modes (high/low/flashing) draw 0.6A–1.2A loads. Warning: Avoid substituting with 6V batteries—they’ll burn out the lantern’s step-down circuitry. What happens if you ignore voltage specs? At best, reduced LED lifespan; at worst, melted wiring.
| Feature | SLA (Original) | Li-ion (Hypothetical) |
|---|---|---|
| Cycle Life | 200–300 | 500+ |
| Weight | 450g | 150g |
| Cold Performance | Moderate | Poor |
Can I replace the Coleman CPX 6 XL battery with third-party options?
Yes, provided replacements match 4V voltage, 4Ah±10% capacity, and terminal polarity. Aftermarket packs like BST-44B often cost 40% less than Coleman-branded units. However, generics may omit short-circuit protection chips—critical for preventing acid leaks during accidental reverse charging.
Third-party compatibility hinges on three factors: terminal type (F2 Faston connectors), charge controller logic, and casing rigidity. For instance, the BST-Group BT-4S uses thicker lead plates for 350 cycles but weighs 500g—10% heavier than OEM. Practically speaking, most campers won’t notice the weight difference. Pro Tip: Test replacements with a multimeter—reputable brands maintain 4.0–4.2V open-circuit voltage. Beware of counterfeit units labeled “4V” that sag to 3.6V under 1A loads. How to spot fakes? Genuine SLA batteries show UL certification marks and 1-year warranties.
How do I charge the Coleman CPX 6 XL battery safely?
Use only the included 4V 500mA AC charger or Coleman-approved equivalents. Charging cycles take 8–12 hours, with the smart IC automatically switching from CC to CV at 4.5V. Overcharging beyond 4.8V risks hydrogen gas venting—though modern SLA designs include pressure-relief valves.
The charging protocol involves three stages: bulk (constant 500mA current), absorption (tapering current at 4.5V), and float (4.2V maintenance). Transitioning between these phases prevents electrolyte stratification. For example, leaving the lantern plugged in for 24 hours post-full charge won’t damage the battery, thanks to the float stage’s microcurrents. However, repeated partial charges (e.g., topping up after 30 minutes of use) accelerate plate corrosion. Pro Tip: Deep-cycle the battery every 6 months—drain to 10.5V (under load), then fully recharge to recalibrate capacity readings.
| Charger Type | Voltage | Safety Rating |
|---|---|---|
| OEM Coleman | 4V±2% | UL/CE Certified |
| Generic SLA | 4V±5% | No Certification |
| USB Mod | 5V | Unsafe |
What’s the lifespan of the CPX 6 XL battery?
Expect 2–3 years of regular use (monthly cycling) or 5+ years with light seasonal use. Capacity degrades to 80% after 200 cycles—signaled by runtime dropping from 7 to 5.5 hours on high mode. Storage above 30°C accelerates aging by 50% due to accelerated plate oxidation.
Factors influencing longevity include discharge depth, recharge timing, and vibration exposure. For example, draining the battery to 0% weekly might reduce lifespan to 18 months. Conversely, keeping discharges above 50% (e.g., recharging after 3 high-mode hours) extends cycles to 400+. Transitional strategies like periodic equalization charges (12-hour trickle charges) help balance cell voltages. Pro Tip: Check resting voltage monthly—a healthy 4V SLA should read 4.1V after 24 hours off-charger. Readings below 3.8V indicate irreversible sulfation.
Can lithium batteries work in the CPX 6 XL?
Not directly—standard 3.7V Li-ion cells underperform, while 4.2V LiFePO4 packs risk overvoltage damage. Retrofitting requires adding a buck-boost regulator (set to 4V output) and modifying the battery compartment. However, DIY lithium conversions void UL safety certifications and may breach local fire codes.
Technical hurdles include replicating the SLA’s flat discharge curve—lithium chemistries natively output 3.0–4.2V, confusing the lantern’s low-voltage indicator. For instance, a 4V LiFePO4 pack would shut down abruptly at 3.2V instead of gradually dimming. Moreover, lithium’s higher energy density (200Wh/kg vs SLA’s 40Wh/kg) offers no practical benefit here, as the lantern’s runtime is capped by LED driver efficiency. Pro Tip: If lithium conversion is unavoidable, use LiFePO4 with a 4V DC-DC converter and separate low-voltage disconnect circuit.
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FAQs
No—6V input overloads the LED driver, causing permanent circuit board damage within minutes. Always match the original 4V specification.
Is the CPX 6 XL battery recyclable?
Yes—99% of SLA components are recyclable. Return spent batteries to certified e-waste centers; never dispose in household trash.
How do I know when to replace the battery?
Signs include dimming within 2 hours on high mode, visible case bulging, or charger LEDs flashing red instead of green.
