The DZ01 is a 7.2V 7.8Ah NCM lithium battery arranged as 18NC-2S3P, wrapped in PVC and measuring about 60 × 38 × 68 mm. It holds roughly 56.16Wh and weighs 290 g before any lead or connector is added, which puts a full-shift reserve into a pack small enough for a hand-held housing.
Enquiries for this model usually arrive from one of three places. The first is a 7.2V battery for handheld monitors or a portable instrument, where the pack has to sit inside an existing moulding and feed a steady, modest load. The second is lighting hardware — work lamps, emergency heads and inspection lights built around a two-cell lithium supply. The third is a device whose original pack has been discontinued, where the job is to match the electrical and mechanical envelope rather than the voltage label alone.
We offer this model for evaluation rather than as a finished plug-in part. The 2S3P build, the connector set, the lead lengths and the protection thresholds can each be re-cut around your device. What we ask you to bring first is the pack revision you are comparing, the load profile your device actually draws, and the charger you intend to use — with those three on the table, the conversation moves to a drawing and a sample instead of a guess.
As an NCM battery manufacturer we keep cell selection, protection design and pack assembly with the same team, so a change agreed at drawing stage carries through to the units you receive. If you are also weighing a 2S1P or 2S2P pack in the same voltage class, compare the envelope, the duty cycle and the charger you already own before comparing capacity figures.
Nominal voltage is 7.2V because two NCM cells sit in series; the parallel strings behind them decide how much charge is available before the pack reaches its floor. At end of discharge the pack sits at roughly 5.6V, so any device it powers should treat that as the point to stop drawing current rather than as an operating plateau.
Capacity is quoted two ways for a reason. The 7.8Ah figure is the rated capacity at the C5 rate — a five-hour discharge — and it is the number to use when sizing a product around typical performance. The 7.3Ah minimum is the floor we accept at test. Budget your runtime against the minimum rather than the rated figure and the first production batch will not surprise you.
Because the pack is a 2S3P arrangement, three parallel strings share the current and add their capacities together, while the two series cells set the voltage. That layout is what lets a relatively small block carry 7.8Ah, and it also means the pack behaves most consistently with a steady, moderate load rather than a sharp pulse train, since parallel strings divide current unevenly during fast transients.
56.16Wh is simply 7.2V multiplied by 7.8Ah at nominal, and it is the honest way to compare this pack with alternatives at other voltages. Ampere-hours on their own mislead: a 3.6V pack with the same Ah figure carries half the energy. What watt-hours do not tell you is runtime. That depends on the average load, the cutoff your device applies, the temperature inside the enclosure and the losses in any converter between pack and load — a device averaging a few hundred milliamps will run far longer than one drawing a couple of amps from the same pack.
The energy figure drifts with conditions as well. Capacity falls at low temperature and falls again as the pack ages, and the C5 rating assumes a moderate test temperature and a controlled discharge. If your product is specified for cold storage or lives in a warm cabinet, size the pack with margin and validate the result on a sample rather than on a datasheet.
| Parameter | Value |
|---|---|
| Recommended charging current | 1.56A |
| Maximum charging current | 2.2A |
| Charge cut-off current | 78-156mA |
| Charging lead | 20AWG, red positive / black negative, 50 ± 5 mm |
| Discharge connector | JST-XH-2P, red positive / black negative, 90±10mm |
| Connector type, lead length and wire gauge | Configured to your drawing and pinout |
The standard build wraps the cells in PVC sleeve rather than a hard plastic case. That keeps weight down and lets the pack follow a rectangular envelope closely, but it also means the pack carries no ingress protection of its own — it is designed to sit inside your product's housing, not to face dust or water directly. If the enclosure is washed down or left outdoors, say so at drawing stage; a different enclosure is a different specification.
The stated dimensions cover the wrapped body only. Leads, the connector body and any sleeving sit outside that figure, so reserve room for the cable to exit and bend without being pinched against a housing wall. Weight carries a tolerance too, which matters on a hand-held product where the pack sits near the grip: check balance with the real pack rather than with a nominal weight on a drawing.
There is no rigid mounting bracket in the standard configuration. Packs are usually retained by the housing itself, a foam pad or a strap; if your assembly needs a fixed bracket, screw lug or locating tab, that can be designed into the pack structure. Mechanical fixation matters more than it looks — a pack that can move will eventually chafe a lead, and a chafed lead is a field failure rather than a warranty discussion you want.
Heat is the other consequence of a wrapped construction. PVC holds heat close to the cells, so leave an air gap where the layout allows and keep the pack away from regulators, lamp drivers and motor controllers that run warm. The protection circuit will interrupt the pack if temperature climbs, but that is a safety net, not a cooling strategy.
Labelling is applied to the wrap and can carry your part number, polarity marks and production data, which keeps identification readable after the pack is installed.
Cycle life on this model is listed at 1,000 cycles or more with at least 70% capacity retention. Read as a headline, that says the pack is built for years of routine use; read as a specification, it only means something alongside the conditions it was measured under.
Ask for the model-specific test report and look at four things in it: the charge and discharge rates used for each cycle, the ambient temperature, the depth of discharge, and the capacity level that counts as end of life. A cycle run gently and shallowly will always look better than one run hard and deep, and both can legitimately be printed as 1,000 cycles.
Charge retention is the companion figure — at least 85% after 28 days, again under stated test conditions. It tells you how much charge a pack still holds when a device sits on a shelf between jobs, which matters for seasonal products and for stock that waits before shipping.
Neither figure is a project-life promise. Real service life depends on how hard your device works the pack, how warm it runs, how deeply each shift discharges it and how it is stored between uses. The practical route is to set an acceptance threshold with your engineering team, measure capacity at the start and end of a sample validation programme, and use that result rather than the datasheet to set a replacement interval in the field.
| Parameter | Specification |
|---|---|
| Product Name | 7.2V 7.8Ah NCM Lithium Battery Pack |
| Battery Type | Rechargeable NCM lithium-ion battery |
| Category | Custom NCM Lithium Battery Packs |
| Nominal Voltage | 7.2V |
| Rated Capacity | 7.8Ah (C5) |
| Minimum Capacity | 7.3Ah (C5) |
| Rated Energy | Approx. 56.16Wh |
| Cell Configuration | 18NC-2S3P |
| AC Internal Resistance | ≤90mΩ |
| Packaging | PVC |
| Dimensions | Approx. 60 × 38 × 68mm |
| Weight | 290±20g |
| Charging Voltage | 8.3-8.4V |
| End-of-Discharge Voltage | Approx. 5.6V |
This pack earns its place in equipment that draws a steady, moderate current for hours rather than a hard peak for seconds. Portable instruments and handheld monitors are the clearest case: the block sits in a shallow compartment and the load rarely approaches the discharge ceiling. The same profile suits portable and emergency lighting heads, inspection lamps and work lights built around a two-cell supply.
Security and monitoring equipment is another natural fit — access-control readers, camera nodes and remote sensing units that run from a small lithium pack and are charged between shifts. Industrial control cabinets, measuring instruments and communication equipment follow the same logic, provided the ambient inside the cabinet stays inside the operating window.
Medical and electronic equipment is a candidate rather than a default. A pack may suit a portable diagnostic unit or a patient monitor, but the finished device carries its own approvals and has to be reviewed as a system, not as a battery on its own.
Small backup power is possible where the standby load is light and the recharge cycle is planned. What the pack is not built for is a device that keeps pulling current after the low-voltage cutoff, a motor with a heavy inrush, or a sealed enclosure that bakes in summer. Those cases need a different configuration, and we would rather say so at the enquiry stage than at the validation stage.
For any of the above, the final call rests on four checks: the load profile, the charging system, the operating environment and the installation space. A 7.2V battery for handheld monitors and a 7.2V battery for a work light can share a voltage and still need different packs.
Charge this pack only with a dedicated two-cell lithium charger whose voltage and current match the specification. A lead-acid or nickel charger will not terminate correctly and should never be connected, even for a test. Observe polarity every time — red positive, black negative — and check the connector pinout against the drawing before the pack goes into a device.
The rules that keep the pack safe are simple and non-negotiable. Do not exceed the charging voltage or current limits, do not exceed the discharge current, and never reverse polarity, short-circuit or overload the pack. Do not overcharge or over-discharge it, do not force it beyond its temperature window, and do not charge below 5 °C or above 45 °C. Keep the pack away from fire, heaters, water and corrosive materials, and do not discharge or store it above 55 °C.
Install it in a dry, ventilated position with mechanical fixation that stops it moving in service. Do not open the pack or attempt to replace cells without authorisation — the protection circuit and cell connections are not serviceable in the field, and a pack that has been opened should be taken out of use.
Treat a damaged pack as hazardous. A pack that has been crushed, swollen, overheated or immersed should be isolated, never charged, and handled by trained personnel.
This product is a lithium battery dangerous good. Installation, maintenance and system integration belong with trained professionals, and the product manual and the agreed technical specification take precedence over any general guidance.
To request a quote, share your operating voltage range, your steady and peak load together with how long each lasts, your charging method, target runtime, installation drawing, connector pinout and application environment, along with sample quantity, expected order volume and destination market. It also helps to compare the available custom NCM battery packs before deciding. A revised voltage, connector or enclosure requires a separately approved specification, so performance should not be assumed to be identical to an existing build.
Technical questions reach the people who build the packs. Our engineering group in Shenzhen reviews your device's voltage window, load profile, enclosure space and charger before proposing a configuration; our sample group then builds units so you can validate fit and runtime before production. Cell selection, BMS design and pack assembly stay in-house, with quality checks in process and at final inspection, and a documentation team handling certificates, test reports and shipping papers. When a unit behaves unexpectedly in the field, our engineers help trace the fault and advise on installation and commissioning.
It can, once three things line up: the compartment, the lead route and the charger. The wrapped body measures about 60 × 38 × 68 mm, and the leads and connector sit outside that envelope, so the lead assembly needs room to exit and bend without chafing. Send the housing drawing and the connector pinout and we will confirm whether the standard build fits as it is or whether lead length or connector should change. Fit is a drawing question, not a voltage question.
No — 7.2V describes the nominal voltage only. A replacement also needs a compatible charging profile and cut-off, a protection arrangement suited to the device, the same connector and pinout, and an envelope that fits the compartment. A LiFePO4 pack, a nickel-based pack or a different lithium chemistry can all sit near 7.2V and still expect a different charger. Compare the full specification, not the label.
The 7.2V 7.8Ah NCM lithium battery is quoted with a rated and a minimum capacity because the two answer different questions. The rated figure is typical performance at the C5 rate; the minimum is the floor we accept at test. Size runtime against the minimum and your product still meets its claim on the slowest pack that leaves the line.
Keep them in a dry, ventilated place away from heat, direct sun and corrosive materials, and follow the storage state of charge in the product manual rather than leaving packs fully charged for months on end. Warm storage ages cells faster than cool storage, so a stockroom beside a heater or a compressor is the wrong home. If stock has been sitting through a long season, check voltage before releasing it to the line.
It can, but the enclosure becomes part of the thermal design. PVC holds heat close to the cells, and both capacity and cycle life suffer when the pack runs hot. Leave an air gap where the layout allows, keep the pack away from regulators and lamp drivers, and measure the temperature at the pack surface through a full duty cycle rather than at the box wall. If those readings sit close to the operating limit, a different configuration is the better answer.
The specification sheet and dimensional drawing for the exact revision are the starting point, and a cycle-life test report with its charge, discharge and temperature conditions can be requested for the configuration you are evaluating. As an NCM battery manufacturer we issue those documents against the pack we actually build, so the revision on the drawing matches the revision in the box. What is available depends on the pack and the destination market — a report issued for a different pack does not cover yours.
